1954 ford customline

Hey I'm building a 54 customline 2dr, I'm looking for motor swap options, I'd like to put a 300 straight six in it, length maybe a problem. I know 302-351 or ford 352-390fe are the go to motor . So let's see non ford motors have been used. Caddy,Olds,Pontiac, hemi? ...let the games begin

 

..You might want to post this on the main board instead of the intro section for greater exposure.