need some help,going to put a tunnel ram on my 347 trying to decide weather to use the 450 or the 600 Holleys / using a pro built 650 dbl pumper now putting out 475 hp at 6300 i am leaning towards the 2x600 thinking they would be easier to tune / what do ya'll think running 4.56 gears 4500 stall
Use the twin 600s.I ran a tunnel ram on a well built 289 with twin 600 Holleys with vacuum secondaries,worked well even on the street.3000lb car,4 speed,5.14 gear. ROY.
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