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post #1 of (permalink) Old 08-30-2018, 08:13 PM Thread Starter
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Join Date: Apr 2016
Location: Odessa, FL, Blairsville, GA
Posts: 168
351 Cleveland sluggish and breaks up at 5000 rpm

I am trying to sort out my 64 Galaxie with a 351C drag racing motor, toploader and now 4.11 gears.
This is actually a 400 block with 351C 4V heads, Torker intake, Holley 750, solid roller cam, Jomar stud girdle and Eagle rods.

It was definitely built to rev, but I can't get more than 5000 rpm's out of it and it is rather slow getting there.

The engine had been crated for 15-20 years and the rockers were not loosened. The motor also just has stock exhaust manifolds and a 2 inch full exhaust.

I am trying to figure out if it is:

weak valve springs from the storage
corked up exhaust
ignition- it has a Mallory Unilite, rotor looks good, unknown coil. Putting a new MSD Blaster II on tomorrow.

Someone rode with me and said it is not the carb, he could smell it, said if it was the springs, it would be skipping at all rpm ranges. Said put the coil in and a MSD 6AL.

Any help in determining what could be causing this problem would be appreciated.
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1964 Galaxie 500 351C 4 speed
1971 Pontiac Trans Am 455 HO
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