One more note on the pull hard to 4800-5200 rpms then drop off sharply.
CLASSIC symptoms of sucking the bowl dry on the carburetor. More times than not that's going to be the issue vs weak valve springs or something not up to par in that area. I usually look there before diving into the engine to see if there are valve train related issues......
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73 Ventura, SOLD 455, 3740lbs, 11.30's at 120mph, 1977 Pontiac Q-jet, HO intake, HEI, 10" converter, 3.42 gears, DOT's, 7.20's at 96mph and still WAY under the roll bar rule. Best ET to date 7.18 at 97MPH (1/8th mile),
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