Welcome Bob,
I have an '88 5.7 with7747 too , running AMUS bin with 700r4 (4,10 gears) and TCC. Your 305 injectors will be a little wimpy for the 350. I'm guessing your '88 donor is a C1500 (I thought C10 was a square body, 87 - )? You have options like EGR delete, and Hiway Lean Cruise in "patches" among other tuning stuff in scalars and tables. Lots of good info in this forum, enjoy.
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