5.0 gt40 build help!!
I have a 1989 xlt lariat that I am working on. IMCO 2.5" exhaust no cat. Short bed single cab truck. I wanted to give her some more power but not radically build it so I decided to get a set of cast iron gt40 heads with brand new trick flow springs off of a 1993 cobra, low mileage (less than 80000) having them mildly ported and polished, just enough to let them breath better. Got some 1.7 ratio roller rockers for it. Stock cam. with the 1.7rr it will get me .472/.472 lift. Stock bottom end. the intake is going to be a 5.0 h.o. upper and lower intake from a 1992 mustang gt motor. I have the intake, MAF, wiring harness, ecu, pretty much everything to just "plug and play." I thought of this the other day just after sending the heads and intake to the machine shop to be ported, polished, and port matched. My question is The mustang ecu sending fuel to the injectors is going in the 351w and h.o. firing order.. and I'm using the stock non ho cam and bottom end... Will there be a problem long term or short term with running standard 1-5-4-2-6-3-7-8 firing order with the newer computer pushing fuel to the 1-3-7-2-6-5-4-8 order? Thanks guys, any opinion helps