I am still torn between the NexStar and P-51 Trainer but recently I have been leaning more towards the P-51 because of its good looks and many features. I was wondering that because of the P-51's cowl, could I still fit a larger engine on the firewall? I don't see a replacement 3-blade prop. as an accessory on the P-51. Are those even availabe? Could a larger engine even be installed on the NexStar? Sorry, I'm not familiar with the engines and their mount sizes.