Try Chasis Engineering inc
http://www.chassisengineeringinc.com/chevy/1937-1954chevpu.htm No cutting the firewall if you use the old point type dist. or aftermarket electronic, with the large GM dist you will have to make room for it on the firewall.
The set up is for a 350/ 350, for a rear you can use a 70's camaro or 80's s10 blazer (drum rear)If that is the set up try a 87 astro van driveshaft.
