Please help decode my motor

[MorePower]

Ok, here is what i could barely read
VC417FLF
underneath, and thi sis barely readable and I even sanded it
IEJ52151A
I was told it was a 350, ok if so, what year, etc etc
thanks sooooooooooo much

[dons454s]

Originally Posted by MorePower

Ok, here is what i could barely read
VC417FLF
underneath, and thi sis barely readable and I even sanded it
IEJ52151A
I was told it was a 350, ok if so, what year, etc etc
thanks sooooooooooo much

Check out the flf part real good because I dont have anything like that. I have a ton that are one letter off of it in many combinations. What year do you think it might be?
Don

[MorePower]

the FLF part is correct. Just the numbers and letters below I can barely read. No idea what year it is,thanks for the help

[RSTYCVY]

V=Flint Engine Plant
04= April
17=17th

As far as the FLF goes there is no such code .
It may be a TLF or a BLF
TLF= 1978 400c.i.
BLF= 1990 305c.i.
Oter possibilities are:
FLH
FLJ
FLK
FLL
FLK
FLM
FLR
FLS
FLW
These are all 85' 350 codes


You might want to go by the casting number on the rear of the block.

[MorePower]

which side on the block,pass or dr side,near bellhousing??? I will get it,is it hard to read or get at???

[RSTYCVY]

I would check the driverside first then the passengerside. It is difficult to access. A mirror helps. If you can clean the area off, a piece of clay to make an impressoin helps too.

[MorePower]

ok I will check, let u know tonight what and if i find anything, thanks...i am and

[SSC's76]

Dont get your hopes up. It's not a 400 most likely not a 350 either, it's a moslt likely a BLF 305. is your harmonic damper (ballancer) 8in or 6in?

[MorePower]

ok this is what I got from the drivers rear. "4010207"
The only nuber that is questionable is 401?207, maybe an 8,2< Not sure,best guess was a 0. Very hard to see back there............Maybe I was misled when I bought this truck. Was told it was a 350

[bigarmzz]

which side is your dipstick on?

almost always the 305's were on the pass side with the exhaust manifolds that came up even with the valve covers instead of below the spark plugs

[Slonaker]

My '86 305 actually has a big "305" cast into the block near the front in numbers about 3/4 in tall. You can see it from underneath, I think on the driver's side. You might see if yours has that.

Slonaker

[MorePower]

just checked on another site.
1980-85 year 14010207 block number 350 cu - - 4 bolt main truck
thanks for the help

[MorePower]

GM Engine decoding list...hope this helps anyone else out

Engine Block Casting Numbers

Notes (for below): "High Power" is the maximum rate HP this block was used for, "Low Power" is the lowest rated horsepower RPO engine the block was used in. "Main Caps" is the number of bolts holding the cap. A "two-bolt" main, or a four-bolt main. Four bolt main blocks are desirable in high performance applications because the extra strength of the additional bolts keeps the bottom end rigid and less prone to failure. However, a properly prepared 2 bolt main engine will work just fine (often times you'll lose a rod bolt before you break a crank because it's "only" a 2 bolt main).

Years Casting CID Low Power High Power Main Caps Comments
1980-85 140029 350 - - 2 car
1973-80 330817 400 150 180 2 car, truck
1975 355909 262 110 110 2 car, truck
1976-85 355909 305 - - 2 A
1975 360851 262 - - 2 Monza
1976-79 361979 305 - - 2 car, truck
1978-86 366245 350 - - - car
1982-86 366286 350 - - 4 Chevrolet, siamese
1982 366299 350 - - 4 Chevrolet, aluminium
1956-67 383810 283 - - 2 -
1967-68 389257 302 - - 2 Z-28
1968-73 391436 307 - - 2 -
1965-67 393288 283 - - 2 car, truck
1976-79 460776 305 - - 2 car, truck
1976-79 460777 305 - - 2 car
1978-79 460778 305 - - 2 car, truck
1979-82 471511 267 - - 2 car, truck
1976-85 581671 305 - - 2 A
1985-94 1489363 350 - - 2 -
1979-82 2135412 267 - - 2 -
1979-82 2404929 267 - - 2
1973-76 3030817 400 - - 2 car, truck
1958-61 3556519 283 - - 2 car, truck
1955 3703524 265 195 _ 2 car, no filter
1955-56 3720991 265 195 225 2 car, truck
1957 3731548 283 220 283 2 -
1956-67 3736935 283 - - 2 -
1957-59 3737739 283 220 290 2 car, truck
1958-62 3756519 283 170 315 2 car, truck
1956-67 3756935 283 - - 2 -
1962-65 3782870 327 250 375 2 car, truck
1956-67 3789187 283 - - 2 -
1962-67 3789817 327 210 275 2 car, truck
1961-62 3789935 283 170 315 2 Late 61 car & vette
1962-67 3790721 283 170 220 2 Chevy II
1964-67 3791362 327 250 300 2 Replaced 3790721
1958-63 3794226 283 170 195 2 Car & truck
1968-69 3794460 327 250 250 2 truck
1968-69 3814660 327 - - 2 F A
1968-69 3814660 302 - - 4 Camaro, Z-28
1963 3830944 327 - 300 2 -
1956-67 3832338 283 - - 2 -
1964-66 3834810 283 195 220 2 Car, truck & marine
1962-63 3834812 283 170 195 2 car & truck
1958-62 3837739 283 - - 2 -
1964-68 3849852 283 195 220 2 car & truck
1956-67 3849859 283 - - 2 -
1956-67 3849935 283 - - 2 -
1964-67 3852174 327 - - 2 car, truck
1968-76 3855961 350 - - 2 car
1964-67 3858174 327 275 350 2 Full, A & Y
1964-67 3858180 327 250 300 2 -
1962-67 3858190 327 - - 2 -
1965-67 3862194 283 195 220 2 Chevy II
1962-66 3864812 283 230 - 2 car, truck
1964-67 3868657 327 300 - 2
1962-67 3876132 327 - - 2
1963 3889935 283 - - 2 truck
1967 3892657 302 290 290 2 Z-28, small journal
1967 3892657 327 210 350 2 car & truck
1967 3892657 350 295 295 2 Camaro
1968-69 3892659 327 210 - 2
1967 3896944 283 195 195 2 replaced by 307 in 68
1967 3896948 283 195 195 2 identical to 3834810
1967 3903352 327 210 350 2 cars only
1969-80 3911460 350 - - 2 A
1968-73 3914635 307 - - 2 car
1968 3914636 307 200 200 2 car & truck
1968-69 3914638 327 - - 2
1968-73 3914653 307 - - 2 A
1968 3914660 327 210 300 2 cars
1968 3914678 302 290 290 2/4 Camaro, Z-28
1968 3914678 327 210 350 2 car & truck
1968 3914678 350 295 295 2 Camaro/ChevyII
1965-67 3932288 283 - - 2 A
1956-67 3932338 283 - - 2
1974-75 3932368 350 - - 2
1969-73 3932371 307 - - 2 car,truck
1969-73 3932373 307 - - 2 car,truck
1969 3932386 302 290 290 4 Camaro Z28
1969 3932386 327 210 210 2 Camaro
1969 3932386 350 300 350 4 LT1
1969 3932388 302 290 290 4 Z28
1969 3932388 350 300 300 4 cars
1968-69 3933100 327 - - 2
1968-69 3933180 327 - - 2
1968 3941174 307 - - 2 truck
1956-67 3949852 283 - - 2
1970-80 3951509 400 150 265 2/4 car,truck
1970-73 3951511 400 255 265 4 B & G body
1962-67 3953512 327 - - 2
1968-69 3955618 327 - - 4 A,F,Vette
1969 3956618 302 290 290 4 Z28
1969 3956618 327 235 235 2 fullsize
1969 3956618 350 250 350 2/4 cars
1969 3956632 307 200 200 2 car & truck
1969-76 3958618 350 - - 2 A
1962-63 3959512 327 250 - 2
1956-67 3959532 283 - - 2
1968 3970010 327 - - 2 A
1969-79 3970010 350 185 370 2 or 4 car, truck, Vette
1970-73 3970014 350 200 300 2/4 LA built Camaro
1969-73 3970020 307 115 200 2 car,truck
1969-72 3970024 307 130 200 2 A,F,X
1968-76 6259425 350 - - - car,truck
1980-84 14010201 305 - - 2 car,truck
1980-84 14010202 305 - - 2 car,truck
1980-84 14010203 305 - - 2 car, truck
1980-82 14010205 267 - - 2 -
1980-85 14010207 350 - - 4 truck
1980-85 14010209 350 - - 4 truck
1978-86 14010231 305 - - 2 -
1979-82 14010280 267 - - 2 car
1982 14011064 350 - - 4 Chevrolet, high tin
1979-82 14016375 267 - - 2 -
1979-82 14016376 267 - - 2 car
1978-85 14016379 350 - - - car, truck
1980-84 14016381 305 - - 2 car, truck
1978-88 14016383 305 - - 2 -
1979-82 14040205 267 - - 2 -
1978-86 14049047 305 - - 2
1986-94 14079287 350 - - -
1987 14088526 350 - - 2 Camaro
1986-94 14088548 350 - - - -
1986-92 14088551 305 - - 2 -
1988-94 14093627 305 - - 2 -
1986-94 14093638 350 - - -
1988-94 14094766 305 - - 2
1986-94 14101148 350 - - -
1987-88 14102058 305 - - 2
1969-85 14316379 350 - - 2

[MorePower]

weird thing is....dipstick on pass side, and I double checld the numbers 3 times, its a 350, 4 bolt main. truck motor, it may actually be the orig motor. I was told its 60 over,roller rockers,400hp. I believe it cause this truck is fast.

[86 GMG]

my motor has a 5.7 raised numbers on the passenger side behind the head facing up just before the tranny and block join together maybe that will help also b/c you still sound doughtfull sp?

[SSC's76]

Originally Posted by MorePower

weird thing is....dipstick on pass side, and I double checld the numbers 3 times, its a 350, 4 bolt main. truck motor, it may actually be the orig motor. I was told its 60 over,roller rockers,400hp. I believe it cause this truck is fast.

Yea, but Ive had 305's that were vituraly stock that people would crap thier pants driving.

Which site did you get the casting numbers from, www.mortec.com/ ? 1401207's can come in either 2 or 4 bolt flavors.

[Captkaos]

Originally Posted by MorePower

....it may actually be the orig motor.

What is the VIN numbers 8th digit? I am betting it is either a G or H. C10's from 1981 - 1986 didn't have the 350 as an option in the US.

[SSC's76]

Originally Posted by Captkaos

What is the VIN numbers 5th digit? I am betting it is either a G or H. C10's from 1981 - 1986 didn't have the 350 as an option in the US.

True. My 86 came with a 4.3L from the factory.

[MorePower]

Here is my VIN, decode away!!!!

2GTCC14D3B1544071

[Captkaos]

Here ya go... (typo'd on the above, should have said 8th not 5th, I corrected it)

2 - Canada
GT - GMC
C - 4001-5000 Hydraulic
C - 2 Wheel Drive 1981-1986
1 - 1/2 Ton
4 - two door cab
D - 250 Inline 6 cyl
3 - Check digit
B - 1981
xxxxxxx - production number

[MorePower]

what does check digit mean??? Was it an automatic or stick?

[Captkaos]

Originally Posted by MorePower

what does check digit mean??? Was it an automatic or stick?

It doesn't mean anything, it is a digit included for a check, hence check digit.

No idea on the trans. That would be listed in the Options sheet in the glovebox.