check your electrical connection to your shifter. There is an interupt switch upon changing forward/reverse. On the older model it was module with Manual relay. The newer update is electronic module solid state. Worth a look maybe defective. The purpose of this switch is to interupt your...
I have a 1990, OMC 5.7 Cobra (GM350) with Holley carb 4160, I installed an Edelbrock intake manifold performer with 1409 Edelbrock carb (nice fit). Need advice, parts# and resources; The fuel line is opposite side location, the fuel throttle linkage does not match/ not align with new Edelbrock...