Plastic bowl Master Cylinder!!!!!!!!!!!!!

Thanks for the link to the Dr Diff kit, I didn't see it as clearly as I should have in the above posts... That looks like the way to go for sure and pretty reasonable. I should have looked into this before Monster Mopar, I might have been able to pick a kit up while I was down there and saved some shipping.

Am I correct that my 75 dart will have the 15/16" bore?