figulaz
SCCoA Member
I getting ready for final bolt-up on my 92 SC. I have 2 sets of perfectly good heads an 89 casting and a 94 casting. Which ever I install will just get valve lapping and a new valve stem seals. My question is one yr superior over the other? I noticed the rocker arm balls were larger in the 94 casting. Also the bolt is a 13mm head and goes deeper into the head instead of the 10mm. Does one have superior flow? Outside of the rocker arms they look identical. Any input is appreciated.