I have a problem with a converted 5.7 liter out of a 90 1/2 ton Suburban. This motor is a reman from Advance Auto Parts. It has 12,000 miles on it. I converted it from a TBI to a carburetor. I had to change the intake. I used a Professional Products Air Gap copycat intake and a 600 Edelbrock with electric choke. My problem is with this combo I have to run 25-30 degrees before top dead center to get power and shifts that don't lag. This motor is in a 73 3/4 ton chevy pickup with a 14 bolt FF rear with I think 4:56 gears. Can anybody solve my bogging problem at less timing advance? I don't know if its the fuel injection heads, running too much fuel, or another problem. This intake and carb combo ran great on the 350 that was originally in the 73 pickup.