Originally Posted by OneBadGMC
Crankshaft hould be at the same angle that you can match with your pinion angle...
well yes and no. No doubt the straighter and flater the crank, driveshaft and pinion is the better, but some things are just to tall for that to work.
Some of the wedge spacers are suppose to have the carb level under hard acceleration. In theory it's to keep the fuel flow even to all the cylinders.
And yes a stumble comes from the carb being to lean.