1 5/8 headers

My 1969 Dart has the Hooker 1 5/8" tube headers like in post #12. It is a 340 with .509 - 292 hydraulic cam, LD340 intake and .202 intake J heads with home porting. Running a 904 using a 2800 stall with 4.10 gears, it turned a best time of 7.92 at 88 mph in the eighth capped up with 245/60-14 Road Hugger Radial GTs. Usually runs consistent 8.0s. Car weighs 3450 with me in it.