Are you trying to use the bellhousing from the auto with the single rail? Won't fit. You should be able to buy a decent T5 for not much money, then you have the benefit of an overdriven gear.
The windscreen itself will always be easy to find - the main cost is the chromed brass mounting hardware. I've seen guys talk about prices from $1000 to $1600. It's hard to see the value in them. You could always go with a racing screen like OZVENOM. I'm not sure what he's doing with his left hand. It almost looks like he's saying "It's this big...." Last time someone mentioned the topic around a table with a few beers flowing, Scott threatened to flop it out onto the table and scratch a mark in the table for all to try to outdo.
Scary stuff - nobody took him up on it.