That 3speed can handle a lot a abuse. I use mine on the strip since years without problems.

Let me quote Bill Fisher here to answer your question:

Quote
The stock transmissions are capable of handling many more HP than the stock engine can produce. The authors 1941 coupe has experienced only one blow up, and that was while shifting at full thottle from 45mph in low to secont just to listening for the fine sound of scond gear rubber
I think now u get the picture grin

Frank