Ive read and read and read and just cant seem to find what the best head for a lm7 5.3 for the money. Right now i have a set of 706 heads on my 5.3 that came stock on it. Now would it be better just doing a port and polish and ls6 valve springs ? or get a set of 243/799 and milling them down to keep the right compression ratio.

I want to learn so tell me the truth ! Be Truthfull!