More cubic inches couldn't hurt, I'd find a 261 to build. This way you can enjoy the car while building the new motor. Also, contact Tom Langdon at Langdon's Stovebolt for roller parts and for his input re stroking the 261 per his article in the 12 Port News. His ph 586 739-9601
and web site www.stoveboltengineco.com
Best of luck
Jim


Jim, I.I. #173
(It's easier to get forgiveness than permission!)