back to top, come on someone has to know exactly what year i should be trying to find, i now realize the shop i was buying from does not know enough to recommend a good shopping list of parts b4 a swap and i should have confirmed more b4 i began this swap, because it looks like it'll be another 3 or 4 days before i am able to drive it, already had a downpipe made for the 421 zc header, and had the a universal cat built into the straight pipe right under the motor mount points with a decent heat shield for 300 dollars (not a bad price i felt, cuz i had them do alot of welding and custom fabrication on the angles of the downpipe and they had to do it from scratch with sections of pipe, that were cut in half, to finish the bottom of the header to the straight pipe, entire system is 2 inches from the header back to the straight pipe and then 2 1/4 the rest of the way back