Ok have a 1990 bayliner with a 3.0 with a cracked block, having trouble finding a similar used 3.0. i can find the mid 80'S 140 which i know is same block just alot looks different. and i heard flywheel and coupler changed somewhere in early 90's. anybody have experience putting a older engine in place ? did find a mid 90'S motor but guy said the wiring harness is different is this true ?