Joined in the watch the fun! As said, get friendly with the tractor supply place, they will be your local "go to" place for all the mechanical bits. The ol' 6 V positive ground stuff NEEDS big cables and clean connections. Not glamourous, but if you feed it right, it will return the love. The poly is a sweet motor, but I'd seriously look at keeping the 6 and if the trans is shot, go with a 5 speed. Since the trans is questionable, please put the thing up on strong stands when trying to get 'er running. I'd hate to read that it runs, right into the wall! Brakes are a pain to get right. If you are swapping the fronts, look into swapping the rears too. You can swap in later bendix self-energizing on the ends, or if the trans IS shot, swap out the trans, driveshaft (ball and trunion) and rear axle for a much better, more reliable and servicable combo.