I know this thread is old but I just discovered a significant issue with my veniolia pop up 261 pistons/302 rods. The pop ups are apparently not machined correctly and are hitting the head. It will take time to sort out so I am going to put that motor on hold. I need something for the spring and was kicking around the 261 cad thing. Anyone finish one and if so can you tell me how it is working, any pitfalls, advice, anyone race a cad 261? Anyonenknow where cad pistons can be purchased reasonably?
