Hi people im new here just need a bit of help

If you have a welder and the know how to build motor mounts it wouldn't take very long at all to drop in a sbc. The biggest cost would be having the driveshaft built. I would say do it and piss off all the purists! Or you could just throw an ad on craigs list offering the truck or sbc for trade for a running slant six.

Post an ad on this website looking for a good slant 6 in your area. You should also try www.slantsix.org there are a ton of slant guys in Cali.