Damper fitment question

I have been in a quandary about not being able to fit my balancer on a 71 304 crank, yet it fits nicely on a 68 390 crank. Are all v8 cranks the same diameter on the snout?

I am contemplating to have the damper honed out to fit the 304, so I can finish up my test fitting.

If I do so, then my 390 crank will be off on its fitment.

What should I do? If the 390 crank is not standard on its snout, then correcting it when machined will be looked at. Seems like a bit of work just to do an odd fitment test, which will be fitted to the 390 once its done and installed.

401jim wrote: OEM or aftermarket is the next question. Most aftermarket ones will press fit on nicely .Some are NOT machined correct. Which one do you have and most people will chime in on this. Jim

It is an aftermarket... Though my main concern is the difference between crank snouts. If the damper fits the a 68 crank perfectly as I need a puller to remove once installed. Hate to modify a 68 snout if it is supposed to be a wee smaller diameter. Have no engine specs for 68, nor a means to accurately measure both cranks and damper.

I guess the more I think about it, the more it am tossing fitment aside for its intended use, to modify both damper and 68 crank to fit 71 on up specs for cross compatibility.

Just thought it was going to be a no brainer... as they fit fine, why make more work of it? Only if someone knows for sure 68 cranks do have a slightly smaller snout. If not, then correcting it will be done, and boring the damper to fit as well.

might take a ball hone and give it a couple hits it might help