I originally had a 250 in my '40 and it wii be going back in. I used a side mount similar to Chassis Engineering and they worked good. The trans is a very tight fit to the floor and we made up a flat plate mount for the trans. I used the shifter off of an early '80s Malibu as it mounts at the front of the tail shaft but seat clearance is still very limited. Possibly a S-10 5 speed would move the shifter ahead a little more. I also used the original clutch fork in the later bellhousing as I am still using the original pedals up thru the floor. The rad was very close so I had the straps remounted to set the rad ahead and used the thinnest spacer I could find for the water pump. Headers work good. Mine has a Must II front end in it with a rack.
Good Luck with it. I would imagine you will get a few more replies as well from other members who have done the same.
