let it breathe!
It sounds as though you are on the right track with your planned mods, however, I might suggest that you work with the heads a bit. Clean up those ports a little and do a gasket match port job. The idea here is to clean up the port walls...not change thier volume, so don't go and hog out a bunch of material. The intakes should be rough so that you don't have fuel atomization issues and the exhaust needs to fit the profile of your header flange, leaving a 1/16th inch material all the way around (your port will be smaller than your header) to create a slight anti-reversionary effect. This will help that restrictive 6 popper head to flow so that the rest of your mods work. If you are running an automatic transmission. You may want to increase the stall speed of the torque converter too.
It sounds as though you are on the right track with your planned mods, however, I might suggest that you work with the heads a bit. Clean up those ports a little and do a gasket match port job. The idea here is to clean up the port walls...not change thier volume, so don't go and hog out a bunch of material. The intakes should be rough so that you don't have fuel atomization issues and the exhaust needs to fit the profile of your header flange, leaving a 1/16th inch material all the way around (your port will be smaller than your header) to create a slight anti-reversionary effect. This will help that restrictive 6 popper head to flow so that the rest of your mods work. If you are running an automatic transmission. You may want to increase the stall speed of the torque converter too.
