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Uno, Are those A-body small block headers? Is the header also hitting the control arm? The Headman A-bodies fit my truck (455) better than they fit in a Cutlass. There are several different oil filter adapters for the Olds. I'm using the one tilts in & foreward slightly & the small dia. long filter ('80's 307). My guess is that the adapter/filter is not what was used on the car those headers were designed for (you would have that same problem regardless of the fact that your engine is in a truck). The picture does not show it well, but I can get right in there & remove the filter (it has to come out through the "hole" between the tubes) not a problem at all. I can get my hand between the filter & the header. I do have to put the adapter on the engine after the header is bolted up. Lorne
Are you using a sandwich type oil cooler adapter between the housing & filter? If so, now I see why the filter is so low. The Diesels & some Toronados had a factory oil cooler, the filter housing has holes taped in it for the hoses. Maybe this would help solve your problem. I can post a picture of the housing with the oil cooler if you would like. I would think with the filter almost rubbing the header, your defeating the purpose of the cooler. In this case your heating up the oil, running it up around the world getting it cooled down just to heat it up again. The outcome is likely no better & maybe worse than with no cooler. Just my thoughts, Lorne