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| | | Forums66 Topics128,164 Posts1,056,977 Members48,458 | | Most Online14,466
Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
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For helping keep this great
old truck web site
on the Internet for over 30 years! and not clogged down
with Ads!  Again, thanks!
| | | | Joined: Nov 2006 Posts: 7 New Guy | | New Guy Joined: Nov 2006 Posts: 7 | Take your valve covers off and look at the casting number on the heads. You might have the 3998991 heads which have the 1.72 intake valves. If so change to ones with the 1.94. I have basically the same engie out of a 1978 truck that was rated at 185hp.
Aaron | | |
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