Not trying to make you feel bad about this swap, but a Ford motor belongs in a Ford. You will have less cubes than even a 290 AMC. Sure the Cobra motor is gonna make decent power, but look at all the work you are gonna have to do to get the whole package to work. Get an engine stand and save the Cobra engine for a Ford. You could even sell it and get yourself a 401. You might even have some money left over if you get a good price for the Cobra engine. A 360 is a fine choice and may even cost you less.
Just my two cents . . .
Bill Dettman
'70 Javelin SST BBG 401, '74 Matador X 401