Snowman, your last post makes it sound like you’re not going with the TBI idea on that 350. I’d be reluctant to recommend a carb or intake alternative as there are so many variables. Maybe do do some research? Depends on what you’re after: performance, driveability, fuel economy, simplicity? And how deep are your pockets. Also, you mention you’re “planning on mating a 700r4 to it”. Be aware that sometime around 1988 that GM began phasing out speedo cables in favor of electronic vehicle speed sensors (VSS). I’m guessing you’d like your speedometer to work on your 3600. You’ll want a 700R4 that has the cable feature; and then you’ll have to have the correct drive and driven gear at the tail shaft to accommodate your axle ratio and tire size. All doable, if you know what you’re doing, or if you know someone you can lean on and learn from, who can walk you thru all the details. There are plenty of good reasons that the purists among us keep ‘em stock; then there are guys like you and I who endeavor to go the street rod direction, for whatever reason.....and re-invent the wheel, and that opens up another can-of-worms....
Good luck,
Dave