Originally Posted By SILVER67
’67 Coronet

505 with Eddy head std port

Flat tappet
.585/600
260@50
268@50

28” tire

With 3.23’s
11.50’s
Trap RPM about 5700-5800 @116-117
And 2900-3000 @ 70mph on the highway

With 3.54 in Dana
Trap RPM about 6000-6100 @120-121
11.0’s when exhaust is off
3200-3300 @ almost 70mph on the highway

9-1/2 convertor is more street friendly
8” convertor is obviously more loose and you have to think about pulling out of a parking lot or Dunkin to accelerate

Doesn’t matter which gear or convertor is in the car……..@ 45-50 mph in manual 2nd it break the tires loose


No doubt! I occasionally replace the Drag Radials with regular 275 street radials for a true radial class at our track. It is downright scary when you jump on it at the top of 2nd gear on the street!

'63 Dodge 330
11.19 @ 121 mph
Pump gas, n/a, through the mufflers on street tires with 3.54's. 3,600 lbs.
10.01 @ 133mph with a 250 shot of nitrous an a splash of race gas. 1.36 60 ft. 3,700 lbs.