I have a chance to buy a 72 240z with a 350 V8 and a broken saginaw 4 speed manual transmission. The 100R rearend is also broken. The car comes with an extra rebuilt saginaw transmission and I plan on replacing the 100R rearend with a 200R from a 280z. Question: is the saginaw a good choice for street use and what is required to replace the 100R with a 200R rearend? Do the half shafts have to be replaced or can the 240z halfshafts still be used?