MGA Propshaft Tech covers that otherwise gaping space between the gearbox and the rear axle. This is one small assembly, but there are some design variations, and there can be some very serious problems.

PS-101 - 3 PROPSHAFTS used in the MGA.

PS-102 - The BAD U-JOINT - when to be SCARED.

PS-103 - U-JOINT Cross Reference List (for MGs)

PS-150 - os - Propshafts and U-Joint Alignment.

PS-201 - os - U-Joint Replacement Video by University Motors, LTD

PS-202 - Universal Joint REPLACEMENT SEQUENCE.