What year 302 did you have built? What is the part# and brand of cam installed? Later 5.0 (aka 302) had a standard firing order and an H.O. firing order which is shared with the 351 Windsor.It is not uncommon by some engine builders to use a 351 cam and firing order when doing a build.It would also help if you could tell us what heads are on it as there are two types of rocker arms used in SBF's.