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#1 |
Registered User
Join Date: Feb 2018
Location: Doland SD
Posts: 836
|
307 heads
Had the valve covers off today to put new old ones on (hated the chrome ) and figured I would take some pictures of the casting numbers. Any one know what they mean
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![]() 94 chevy k1500 350 tbi 373 rear gears 4l60e one wheel peel. Gutless 07 gmc sierra classic rcsb 4.3 lt 5 speed w/t 04 chevy Silverado 1500 ext cab 5.3 4l60e. 81 chevy Scottsdale k10 muncie sm465 Np208 10 bolt 8.2 ( Old Green) |
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#2 |
Registered User
Join Date: Aug 2009
Location: Bowser
Posts: 13,777
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Re: 307 heads
Look here for your casting number.
https://www.mortec.com/castnum.htm |
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#3 |
Registered User
Join Date: Feb 2018
Location: Doland SD
Posts: 836
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Re: 307 heads
Thanks. look like the original 307 heads if I read that right
__________________
![]() 94 chevy k1500 350 tbi 373 rear gears 4l60e one wheel peel. Gutless 07 gmc sierra classic rcsb 4.3 lt 5 speed w/t 04 chevy Silverado 1500 ext cab 5.3 4l60e. 81 chevy Scottsdale k10 muncie sm465 Np208 10 bolt 8.2 ( Old Green) |
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#4 |
Registered User
Join Date: Aug 2009
Location: Bowser
Posts: 13,777
|
Re: 307 heads
A question for you!
You gonna set up a pcv system? Pcv in one cover and a breather in the other. You need it to remove the fumes and moisture in the motor and control the crankcase pressure. |
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#5 |
Registered User
Join Date: Feb 2018
Location: Doland SD
Posts: 836
|
Re: 307 heads
Yes I did not have a long enough hose at the time of the picture. It's all set up now.
__________________
![]() 94 chevy k1500 350 tbi 373 rear gears 4l60e one wheel peel. Gutless 07 gmc sierra classic rcsb 4.3 lt 5 speed w/t 04 chevy Silverado 1500 ext cab 5.3 4l60e. 81 chevy Scottsdale k10 muncie sm465 Np208 10 bolt 8.2 ( Old Green) |
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