The 250 is approximately 1" longer than the 235, measuring from the back of the block where the bellhousing bolts on, to the front of the cramkshaft pulley. Both bellhousings are about 6 1/2" deep. Positioning of the assembly front/rear with custom motor mounts will be necessary due to the differences in mounting hardware.
Jerry


"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!