With a big crank the challenge is ensuring that the conrods don't hit the cam lobes. This means that axial position as well as whip needs to be considered since the rod may go in between lobes.
On my car I needed to do work on the No3 rod to give clearance. You really can't test it until you have the rods running in bores since the rod needs to move in the right plane.
Also I've discovered that Austin didn't machine the cam bearings very accurately. I've seen mag crankcases with the rear cam bearing 20thou nearer to the crank centreline than the front. This really doesn't help!
Charles
On my car I needed to do work on the No3 rod to give clearance. You really can't test it until you have the rods running in bores since the rod needs to move in the right plane.
Also I've discovered that Austin didn't machine the cam bearings very accurately. I've seen mag crankcases with the rear cam bearing 20thou nearer to the crank centreline than the front. This really doesn't help!
Charles