Aluminum vs Iron compression on pump gas

you'll be in the 550+/- range if you can pick up port volume.jmo

More lift would be nice if you are gonna run a flat tappet and achieve 600.jmo

An actual 'after lash' .588 '+' lift is what I expect to see in a 600 hp 4''arm build.
11.1+ comp too.

sounds good though, have fun!

Yes it is a 4" arm. I am using 1.6 Rockers Lift is .614 before lash on the intake and .624 for the exhaust. This is a flat tappet solid cam also. 600hp is just a number and don't mean anything if you cant actually get the power to the ground. I am just excited to be able to finally get it finished. I will be telling everyone it is a 318 anyway.......haaaaaaaaaa