302 Firing Order Questions

horseballz

10 Year Member
Sep 30, 2009
824
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Las Vegas, NV
What year did Ford change the firing order on the 302/5.0 from 1-5-4-2-6-3-7-8 to 1-3-7-2-6-5-4-8 and was it first done on the roller cam engines? The deal is, I'm getting ready to fire up a 5.0 of unknown lineage and if I remember, the block casting is E6 or E8 and it definitely has a roller cam which would lead me to expect the later 1-3-7 etc. firing order, but when I turn the crank with a wrench, the firing order appears (by watching the valve train) to be 1-5-4 etc. I was under the assumption that all of the roller cam 5.0's had the later firing order? Were truck engines different than cars?
Thanks In Advance,
Gene
 
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its a mixed bag. ford changed the firing order for some 302s starting 1982 with the HO engines. as i recall only mustangs got the 351w firing order, everything else got the older 302 firing order.

aout the best advice i can give you is to hand crank the engine to determine the proper firing order and wire accordingly.