I was kicking around the idea of replacing the stock cast 3.76" stroke crank with a 4.00" stroke forged crank for more low end torque.
Has anyone done this before and what kind of mods will this require? (Block Clearancing / Custom Pistons)
I would be using the original 113cc open chamber heads and stock rod length. I was looking for a 10.5:1 compression ratio, but would the Speed Pro domes be too much for the stroke increase?
Any comments are appreciated!
67 BB Vert - in pieces
67 RS SS - in pieces (but less than before)
67 Pieces - in pieces