The car came with an Autobooks 1969-76 MGB Owners Workshop Manual. The manual has a lot of useful information and specifications.

Unfortunately it appears that this book is out of print. Using the ISBN number (0 85147 625 2) to search for the book. I was able to find some used copies.

A good source for parts has been RockAuto.com. They have had most of the parts I've needed, at really good prices. (This is an un-paid endorcement.)