The 1990 350 is probably throttle fuel injected. I had a 93 Chevy pick up with the same set up and it was the most reliable vehicle I had ever owned. I never needed to fix anything in the 130K or so I put on it. It even got reasonable fuel economy, averaging around 18 mpg's and had power to spare.

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DJ


84 300D Turbodiesel 190K with 4 speed manual sold in 03/2012

yeah i have a 95' GMC sierra with the same engine as well. i'm starting to like that truck more and more as i drive it.

just found out
the RV has a 454 not a 350