Go to Fletch's Carb 5.0 ( www.jason.fletcher.net) and go to the efi to carb conversion page. It is very detailed and will tell you the answer to many of your questions.
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89 LX Coupe
306, 10:1 compression, ported 351W heads (2.02-1.60 valves), Victor Jr. intake, 750cfm double pumper, MSD ignition, 1 5/8" full length headers, Flowmaster 2 1/2" American Thunder Cat back system, C-4, 3500 stall, 4.10 gears, 5" Auto Meter Shift Light
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