If you can find the one with the flats on the outer edge, they are less restrictive, as the center orifice is bigger. They are usually found on truck applications. Might be worth a little time on your back in the filth, it's good for building character!
The plate can have anywhere from 4 holes to 8, if you have the 4 holer, punch and drill a few more. 6 is good, eight is better. Aids flow and drainback to the filter.
Don't forget, there is a gasket under the plate between it and the recess in the block.
Forget it, and leakage is guaranteed. Finding a parts store guy who can find it in the catalog, that's the challenge.
Cheap tricks are the best...
Alan627b