so over the last few months of my project people have been asking what i am going to do about the rear end from the increase in power. i have always told them that i believe that's how they came from the factory with a standard MGB diff but they make a good point. that diff probably cant handle the increased power for long and how i would be driving wont help at all so my plan is to use the standard diff and try to be gentle with it till i can afford to get a stronger diff. so how have you all done it? what car did you get your diff out of i am looking more of a limited slip diff if i am going to have to change it all. has anyone just left the standard diff how has that worked out did it break or did it cope well? regardless if the stock diff works fine or not i plan on replacing it
I used the original axle for several years before installing a narrowed Ford axle. The MGB axle/diff is plenty strong for most any 215 engine. The more important issue is gear ratio. You may actually like the ratio, as these things are largely a matter of taste, but IMHO 3.909:1 is low enough to make starting from 2nd easy and reasonable. On the highway your engine will be rev fast and therefore be louder/busier, and you won't get great fuel economy. I think you'll do well to save this part of your project for later although it means two trips to a driveshaft shop.
Been running the stock rear with my 215 for 12+ years. Curtis is right, it's plenty stout.
thank you for the info i will be sure to keep this in mind for the later date