I have an 86' carb head that's been ported and I need new valve springs at the minimum. The block is a 93 efi. The labor is more of a concern than cost but also not looking to spend too much, just a balanced rebuild. I was thinking better push rods and springs than oem and 1.7 scorpion rockers but no camshaft change or valve change so I don't have to have the seats done or anything else I can't do easily/myself. I was going to buy a spring compressor and do that part myself since I hammered the old ones off since it was my first time and no tool, just wanted to port. Last issue, I plan to run strictly ethanol free 90 octane, I have no fuel injectors right now so wondering if a similiar flowing 4 hole swap or even a 19# would be worth it to keep duty lower but messing with pressure and wrapping my manifolds and hoping the 90octane won't vapor lock at slightly lower pressure especially with the 4 hole(if that matters) and egr removed. Running off stock eec-iv and hoping an adjustable fuel regulator and wideband can help get me in the ballpark with timing the distributor and monitor the computer while it tries to adjust, Any thoughts/input would be great thanks.