Hi Robin... did you ever get anything done in the V6 installation? I did a ton of research and contacted Speedway Motors and a tech named Thomas replied.... It has to be a 90 degree engine (4.3 will be fine) in order to use the front cross member motor mounts.... the block has to be based on a SBC motor with the four holed in front by the timing chain cover.... as for a carburetor ... it has to be an aftermarket Edelbrock intake, or, it has to be one of the first 4.3 motors that came with carbs.. IE 1985 Astro van.... I checked with several mechanics as well, and all said the next generation of engines with TBI are not that bad to install... a few more electronic components than you need. I found a 1994 4.3 at a salvage outfit, and a rebuilt TH400 tranny all for $450.... not bad, but I am still waiting and holding out for a carbureted motor, and I have the time. The project is now on hold for the spring/summer so I have the time to look around.... email me at
[email protected] if you want to discuss further... thanks
