hoping for some technical insight, I have a 67 Firebird with a 68 WZ 400 HO, I assumed by looking that I had a 90 degree oil filter housing and purchased the RARE long branch exhaust manifolds, after dissasembly I find I seem to have a 120 degree oil filter assembly? it doesn't seem to match the extension block I also got from RARE, the only 90 degree I see on the market is from Butler and I couldn't get them to confirm that it would fit other than a roundy round email about Pontiac didn't make one for ram air.....before I spend $125 bucks for a piece of aluminum I would like to know if I'm purchasing the correct [censored] part.............anyone out there put the RARE long branch on a 67 and if so what did you find and please be specific.....can I perhaps use the small diameter filter etc...........thanks