77 pontiac lemans/77 a body headers
 

Long time no post, but after some dispute. The olds 350 in my 77 lemans now has a 403. Now that I've got one problem, the flow tech headers I bought for it aren't working. I've tried almost everything massage with hammer moving the engine up with the crane, neither side will fit. Does anyone know of any good headers that will work on a 403 in a 77 lemans? Thanks for any insight!

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Look for headers from a 2nd gen T/A with the 403. I'm not saying they'll fit but I know the 2nd gen F body Pontiac headers fit a Pontiac engine in a 73-77 A body.