318 build with dyno session
I’ll be a dissenter (and probably ignorantly so) that if the heads can be worked a little bit that it’s worth doing. My stock 1.78 valved 72 heads were needing done, but I found some 302s with 1.88/1.60s already in them. Spent a lot of time on YouTube and here reading about porting them and gave it a go. Added headers. And the difference was unbelievable. Woke the car up more than when I swapped from 2.76 to 3.92 gears. Was the real difference bump in compression and bigger valves plus headers over manifolds? Very possible. But I spent a lot of time shaving out that iron and would be willing to do it to aluminum in a heartbeat. Anyway not trying to take away from the post. I don’t know anything about throat and valve ratio lol. Just saying a couple carbide bits and time in the shop to me was worth the effort.
I’ll be a dissenter (and probably ignorantly so) that if the heads can be worked a little bit that it’s worth doing. My stock 1.78 valved 72 heads were needing done, but I found some 302s with 1.88/1.60s already in them. Spent a lot of time on YouTube and here reading about porting them and gave it a go. Added headers. And the difference was unbelievable. Woke the car up more than when I swapped from 2.76 to 3.92 gears. Was the real difference bump in compression and bigger valves plus headers over manifolds? Very possible. But I spent a lot of time shaving out that iron and would be willing to do it to aluminum in a heartbeat. Anyway not trying to take away from the post. I don’t know anything about throat and valve ratio lol. Just saying a couple carbide bits and time in the shop to me was worth the effort.