727 Build for Mid-10s

make sure you get a new front pump gear set. either 1 one with the wider tangs or get the one with 2 flat spots similar to the front wheel drive pump set. as you are getting a new converter anyway. we use the wider pump gear and have never had a problem with it. plug the hole in the front pump and move vent to tail housing. we had trouble with front pump seal leaking several times after 1st stroker motor, so we found that the crank was a little too long. we used a midplate trimmed to bellhousing and never have had a problem again. use the later good transmission pan gasket for leak proof trans pan.

Thanks for the info on the pump gears. Are those really a weak point? I've never heard of those breaking.

How was the original vent leaking? On deceleration on the top end?