I love it, that thing is HUGE!
It's not really that much longer than a 235, to my surprise. The water pump and pulley seem to be a little tighter to the block. The bore is 3 1/8 and stroke 4 1/8, so the cylinders are closer together than that of the 235.
It has side mounts, so it could be installed tight to the firewall. All in all, it probably doesn't take up any more space than a GMC 302.