Chassis Engineering
http://www.chassisengineeringinc.com/chevy/1949-1954chev.htm makes up bolt-in motor mounts and a plate for the trans cross-member. Like was stated, the rad is a problem and so will the exhaust if you decide to run headers Limited space by the firewall. A 235 would go in much easier but I guess if you already own the 250, thats the better choice. Just have to do some fabricating...
