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What was your normal 60' in the heat with the Air Gap? My Dart with a pump gas 340, hydraulic cam, ported Edelbrocks, Weiand X-Celerator, 4.30 gears, at 3300# went a best 1.530 60' and would go 1.55-56 in the heat.
The 10.9-1 408 in it now with the same heads, flat solid cam has gone 1.41 untuned with a Victor on it.
IMHO the X-Celerator is a very underated intake, I've seen them run hard on 340/360s and strokers too.
On “normal” hot summer days it would run 1.53’s in the 60’ with the Air-gap….also, your car has a very similar combo (except a bigger cam and carb), but it goes ~3 tenths faster than my best (6.61 IIRC)…..weird huh?
67 Barracuda street car, 408, e85, 1.38 60', 6.44 @105.9 in the 1/8 mile, 10.19 @130.5 in the 1/4...so far....
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