so the new housing and the 20% greater flowing old bolt? Sheesh! I tell you with my 90 adapter and Hooker Super Comps in my 65 A, I still could barely get the oil filter out, and that was juggling it with oil dripping all over the place. I could have went with a smaller filter (smart) or use a filter relocation up onto the fenderwell and never F with that stupid oil filter inside the headers...I did the latter. A good filter with an anti-drainback valve.