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Click on image for the lowdown. 
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| | | Forums66 Topics128,147 Posts1,056,798 Members48,454 | | 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!
| | THANKS!
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: Jul 2003 Posts: 22 New Guy | | New Guy Joined: Jul 2003 Posts: 22 | I lost all my information when my HD died so need to know how big can I port the intakes on the late big port head?
This is for a 270 racing engine.
Thanks
ROAR
Greasy Thumbs
| | | | | Joined: Apr 2011 Posts: 181 Wrench Fetcher | | Wrench Fetcher Joined: Apr 2011 Posts: 181 | Look at www.inliners.org. They have a bunch of inline Jimmy information. If you have an "H" head there are some real good sources of information there. Normbc9 | | | | | Joined: Jul 2003 Posts: 22 New Guy | | New Guy Joined: Jul 2003 Posts: 22 | Thanks Norm!
There Are guys there that wil have answers!
cheers;
Roar
Greasy Thumbs
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