Cool plan, sounds like one heck of a solid runner!If you do not intend to go big on the bore and you keep the compresion as low as you mentioned, there is just no way you will need a bigger heat exchanger. The forged crank was only made in 63, they are hard to find and only have six counter wieghts,where as most of the cast cranks have 12.The cast cranks are kind of prefered (Leo's book covers this very well)and are plenty strong. Also a high quality harmonic balancer would round out whats sounds like one very reliable engine.
