I haven't looked at it in sometime but I am 99.9999999% sure my McLeod PP has extra weights welded on it for neutral balance , as is a Centerforce I have.

Since PP patterns are pretty much standard, unless it's a Ford LONG type PP you shouldn't have any problem just bolting that PP to a neutral balance flywheel and have it checked.

Talk to your guy that is doing the balancing , they should be able to check it out pretty easily.

Now that I think about it they should be able to spin your flywheel , which would be a good idea to do and confirm the amount of imbalance and correct it if the flywheel has been resurfaced at all, then put on the PP and make sure that the imbalance hasn't changed ?

Is the PP cover , including the weights/welds, all painted over or does it look like some scraped the paint off to add the weights ?