'68 Firebird

[67rstbkt]

Which filter did you go with? NAPA 1258? Also, I've been reading up on that bypass spring in the housing and am undecided on leaving it as is or doing what you did. What are you're thoughts on that? What swayed your decision to block it? I'm having a hard time finding a good reason to go either way, there's solid arguments for both

[CliffS]

Which filter did you go with? NAPA 1258? Also, I've been reading up on that bypass spring in the housing and am undecided on leaving it as is or doing what you did. What are you're thoughts on that? What swayed your decision to block it? I'm having a hard time finding a good reason to go either way, there's solid arguments for both

Ended up with the 1258 (bigger volume). Since the bypass spring is almost 50 years old and the housing (Kauffman) I've been using for the past couple of years doesn't has the bypass at all and that all oil passing the filter is actually filtered made the decission a lot easier. Not a lot to find about this and opnions differ. Couple of Poncho engines builders also advise to block the bypass.