I'm looking for a thunderbolt 4 igm mod/amp(15248t01) for my 1988 7.4l bravo 330hp. I'm currantly using a mod from a 1983 7.4 trs 330 hp on my starb engine but the timing drops to 2 deg atdc when shifting from idle into gear.once rpms come up above 800 rpm timing returns to 8 deg btdc. any help?
Can any one id the brass plate that is on the right side gunwale next to the throttles. looks to be some kind of special edition tag but is to worn to make out. boat is a 88 stinger 312..thanks
