340 Chugging instead of Reving

1969GTS340 said

I'll postbthe carb modle number tomorrow when I'm in the shop.

I can shorten the curve. This has actually been recommended by others from my local track.

The cam was installed dot to dot. I felt it would be fine for breaking in the engine and get some test runs in. Then make improvements over the long winter we have here.

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Since you didn’t degree the cam, take off the drivers side valve cover. Roll the engine over until you are TDC on over overlap (180 degrees from number 1 firing) and look at your valves.

If both valves are open the same, you are at split overlap and the cam is in straight up, whatever that is.

If the intake valve is open more than the exhaust valve, the cam is advanced from split overlap (straight up). You won’t know exactly how much, but you will know it’s advanced.

If the exhaust valve is open more than the intake valve, the cam is retarded from split overlap (straight up). You won’t know how much, but you will know its retarded.

Like I said, something is weird. I’m thinking cam timing is the first place I’d check.