motor swap question

[darynblaylock]

okay,
I have a 1986 gmc with a 305/350turbo trans (long bed)
I want to pull motor and trans out and put it into a shortwide to turn into a show truck (the 305 has sentimental to me)
I have found another truck same year as mine but shortwide that i can get, but i have also found a 92 chevy with a blown up motor.
Both had v8s in them would mounts be a problem?
is the only thing going to be different with them is styling or is there more work to be done with the 92 for my motor to work?

[85gmcguy]

No difference between them at all.

And WELCOME.

[3r!c84]

i gotta ask. whats up with the 305 man?

[my4by2]

305's are not "terrible" motors for a daily driver & can even be stroked. Of course they aren't as nice as a mild 350, but if you already have one & it means something to you then build it man! Just be sure to do some work to the heads to increase the flow - that's the big choke point on those engines! And like he stated - all the SBC's have basically identical mounts & accessories.

[darynblaylock]

the 305 is out of my first truck (75 Scottsdale shortwide) i totaled the truck out and thats all i have left from it really

and thanks

[fast75]

Originally Posted by my4by2

305's are not "terrible" motors for a daily driver & can even be stroked. Of course they aren't as nice as a mild 350, but if you already have one & it means something to you then build it man! Just be sure to do some work to the heads to increase the flow - that's the big choke point on those engines! And like he stated - all the SBC's have basically identical mounts & accessories.

get your heads milled, .202 intake, 160 exhaust valves with a five angle valve job. an edlebrock performer intake and a 650 and sheeeet, you should be good to go, lol.

[russgt]

Are you sure you can clear the bores with 2.02s and 1.6s? The stock bore is 3.736. The valves themselves take up 3.62 and add the spacing between.

[my4by2]

Good point & no - 305's do NOT need 2.02/1.60 valves.... Heck, some 350's don't even need that depending on application & actual head flow... If I did ANY valve work on a set of 305 heads it would of course be the quality valve job (3 angle is MORE than adequate) & maybe a slightly larger exhaust valve only since they are quite small on this head. Other than that just do a little port matching & maybe a little bowl blend & you'll be good.

[fast75]

Originally Posted by my4by2

Good point & no - 305's do NOT need 2.02/1.60 valves.... Heck, some 350's don't even need that depending on application & actual head flow... If I did ANY valve work on a set of 305 heads it would of course be the quality valve job (3 angle is MORE than adequate) & maybe a slightly larger exhaust valve only since they are quite small on this head. Other than that just do a little port matching & maybe a little bowl blend & you'll be good.

i just ASSumed it would work, i went that route with my 350 with the port matching you mentioned. my block was decked, heads milled and the above mentioned valve work. i did have to go to pre-unleaded heads to stay out of the water jackets tho. sorry for any confusion i may have caused. my bad. i do know that it made all the difference in the world with my truck. damn thing will set you back it the seat and pass anything but a gas station.