I was very lucky where I took my motor to have all the block machine work done. One guy there does head porting work on the side with a flow bench. He does lots of LS stuff. The guy said that the out of the box heads are usually in need of attention and bare heads are the best option. I am so glad I started buying stuff years ago for this project.
3.1 MB Views: 29
3.3 MB Views: 28