You will still not gain anything buy running props on the engines then compairing them to each other. Some have different porting, carb sizes and so on. one with high timing but low transfers may turn a prop the best but suck on the top end and vise versa.

The work has already been done for you. just look at see what the local car guys are running in their fast cars and then get that engine.

Also if you are going to run a prop then you will need add more oil to regular car fuel which is in the 10-14% range for revabilty. props are more of a steady stae running which regular car oil will not be enough.

but again your stuff have fun and good luck.