I'm sure this has been covered before, but I couldn't find anything definitive. Plan is to put a Tremec Magnum 6 speed behind an LS in my 65. I'm aware the transmission tunnel will need to be modified, but what about drive shaft clearance? Will the stock driveshaft tunnel be OK? Rear end is 9" & 4 link. I want the car as low as possible without sacrificing much driveability. Thanks in advance to anyone who has gone this route before.