Bearing went out and bent my rod then chipped the piston. Can't find p61's anywhere. After searching countless hours I might have to use pr3 rods and possibly pistons. Will it work and what an I losing. Rod length p61 5.209 pr3 is 5.290 how do I make this work or are there other options?

 

You can use PR3, P30, or P73 pistons and they will bump your compression slightly. A lot of people use those when rebuilding B17s because it makes a bit more power as long as you're tuning for them. You do need to use P61 rods though as they are an oddball length. There's usually some on eBay for sale although I haven't looked lately. Or try G2IC, you'd have better luck there then here.