340 Build

Well, the cam looks about right for what you’re doing with the car.
It should make enough power to run 11’s, but it’s highly unlikely it will with 3.73’s and a stick.

Frankly, this is a case where a stroker crank would have been the best money you could have spent on the motor, from a “seat of the pants” bang-for-the-buck factor, when you were in the planning stages.

Even if it made zero more hp, the extra 75ft/lbs of tq, right where you’re using the motor most of the time, would put a big smile on your face.

What you built is a nice little pump gas 340 with a small cam....... and 340’s aren’t known for their awesome low end grunt.

I think it’s likely the motor is doing what it should....... and that you over estimated what that combination of parts would run like.

I’d seek out a chassis dyno at some point, make a few pulls just to insure nothing strange is going on with the fuel curve, and to see if the power numbers are somewhat close to what that combo should make.

I looked up the cam.
I see it’s a hydraulic...... for some reason I had it in my head it was a solid.
Another reason to get it on a dyno........ see where the valve float occurs, or if it will rev high enough to reach its natural peak before it gets into float.
Sometimes with a fast rate hyd cam things get unhappy and a lower rpm than you’d like.

I just had a mild 360 on the dyno last week with a little solid lifter cam.
That motor was making peak hp around 62-6300, and was still pulling strong to 6800.
Mid-5000’s is a pretty low point to peak for a 340 with decent heads on it.
My suspicion is, on an engine dyno, that combo would keep climbing until the lifters got unhappy.