Quote Originally Posted by sawking
Yes that does help.I'll probly get that cam for it. Does my older 350 have 1.5 rockers on it and Does the 1990 350 have 1.6 rockers on it. Which ones should I use. Also will the tbi intake fit on the older 350. Or should I get a adapter for the four-barrel intake to tbi
I just did this conversion on a 91 PU. We replaced the 350 with a 383 and a mild cam. The heads were ported and we installed headers and dual exhaust. Between the computer and the TBI, we had nothing but problems. It was too lean and it would fall flat on it’s nose. So we got a TBI off of a 454 which helped a little and we added a one inch spacer but the fuel economy was not good.

Finally we installed a Holley carb and an HEI distributor, what a difference. We can fry the tires without any problem and the fuel economy went up. So now we have all this TBI junk laying around collecting dust.

As for mounting the TBI and intake on the 355, you can make it work if you message the center 4 bolt holes of the intake. The newer heads have a different angel to the four center bolt holes. Obviously you don’t mess with the threaded bolt holes in the heads.