I have a 1987 Iroc Z. Was wanting advice on headers. Wondering which ones to use. 350 with L98 heads. Angle plug D port. Comp CL12-142-8 roller cam Eldebrock 2101 intake and 600 cfm Eldebrock carb. 5 speed trans with 345 gears. How much more horsepower do long tubes make over short tubes.

Thanks