I have an 84 CUCV. The guy who owned it before swapped in a 350 from a 78 van. Well it is very old and tired and i loved my 5.3 in my z71. I was looking at a crossmember from pacific fab and one of their motors. How much work is really going to be involved, they say only 5 wires. Also will it bolt right up with my TH400? And gauges- hyroboost? seems like there could be alot of small issues.