Mt 781's before porting were 255cc's the biggest ovals I cc'ed were the 290 castings that cam in at 265 to 267cc's and I thing they were closed chambered heads. Maybe Mark will chime in on the csa.
781/049 heads intake runner CSA?
Has anyone ever measured the stock gm oval port heads True intake cross sectional area? Is It really that big that is advertised.
1 - 1 of 3 Posts
1 - 1 of 3 Posts
- This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Team Chevelle
A forum community dedicated to Chevrolet Chevelle owners and enthusiasts. Come join the discussion about restorations, builds, performance, modifications, classifieds, troubleshooting, maintenance, and more!
Full Forum Listing
Explore Our Forums
Recommended Communities
