If you get to the point where you turbocharge your six, it would probably be a good idea to invest in port FI and some decent electronics. You can do a good job with junkyard parts to keep costs down, but there is a steep learning curve if you've worked only with carbs up to this point. If you go that route, write me off list. I tuned & raced turbo EFI sixes for years and never broke one. Converting an I6 to port injection with boost would be pretty straight forward using GM parts. GMCpanel's point about the Cklifford manifold having PFI bosses is most interesting. A boosted six can match the torque of an average street big block, but you need to keep the detonation and fuel in check if you intend to do it for years. That's why I'd strongly suggest port EFI. GM had mixture correction and some pretty aggressive knock retard festures in most ECMs from the late 80's onward. As suggested, by others in this thread, it all boils down to your personal version of what's cool. The folks on this list are definitely cool. - MikeV
