i have finished honeing my 2.5 block today and next week in class i will start to assemble this beast! can't wait!!! i am getting ready to purchase a header for this motor and i cannot decide on what to get! should i get a 4 into 1 and run single exhaust( kinda like the way a stock 2.5 is now) or a 4 into 1 and then split off into two like the aftermarket duel exhaust you can buy now or go with a 4 into 2 and run duels all the way back? what do you guys or gals reccomend or what are you currently running now? thanks

I also have a Duck powered Fiero. I'd say keep the stock manifold and spend the money on something more useful. The header may help in higher RPM's, but the Duck is not a high winding motor. Buy a nice stereo or cool wheels instead.

i already have those!

I am about to rebuild mt Duke. Bought it with blown head gasketreplaced that but antifreeze ruined bearings. Any thing special or important i should do?