My Mac tru-fit headers don't fit

331efiblue66 said:

I have a set of Mac tf6470 ceramic coated long tubes and mocked them up with the 4r70w on an old 5.0 block, and they don't fit!! I really want to run long tubes, but i'm not real excited about some of the fitment/ground clearance issues I hear of with headman's.
I have a steeroids power rack, and the auto trans, does anyone have a good long tube they have had good things to say about with construction of at least 16ga, don't want any 18 gauge....


PS-Mac tf6470 ceramic coated long tubes FOR SALE

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I run Hooker Comps but everything I've seen about the FPA headers is that they're awesome.

WHY don't they fit? my guess is "mocked them up with the 4r70w". They are designed to fit a stock engine/trans which would be a 289/302 and C4 or manual trans. I bet they are hitting the sides of the AOD pan?

I installed the same headers, they fit fine with the 289/C4, cleared the PS ram and all. Now I have installed an AOD and had to bend the collectors outward which bent the tubes outward causing them to hit the frame next to the gearbox and pitman arm. I'm still fighting to get them to fit without touching somewhere. I should have cut the collectors off just after the 4>1 and had them welded back on at a slight outward angle. That way they would have still hugged the block and given space next to the pan.

I'm debating on switching to Tri-Y's or midlengths if I can't get these to fit without interference. Bottom line is they weren't made to fit an AOD of any year and I haven't seen anyone offer them made to fit for AOD yet.
Jon

PS-Mac tf6470 ceramic coated long tubes FOR SALE

How much?

Well there you go, JBA makes them to fit an AOD, news to me but they still require a drop down bracket for PS? and the $800 price tag rules them out for me unfortunately. I don't know why it's so hard for them to clear the PS, the MACs do.
Jon

Should have bought TF9415. Made to fit 94-95's. Will fit an AOD