chad":23j4uhdt said:would need the later doghouse as well (see vintage van dot com under the blue oval)
That's not nessecarily true. I don't have the 250 in my 64 just yet but I've done some measuring and I think the 250 will fit just fine. I got a 65 doghouse from a yard in Spokane, but then realized there is more to it than just a height difference, they changed the shape as well under and behind the drivers seat it's wider. Looks like a lot of work or a hack job to get it in. He will run into a problem going with either a 200 low mount or a 250 with needing a hump for the bigger bell. And the extra weight off the 250 and torque on those sheet metal hangers. Maybe driveshaft mod needed as well.
A 200 high mount is the way to go for you, unless you want to start cutting things and adding crossmembers. Preferably a late 70's or a '69 on 200. I would have gone with a 200 myself, but I wanted to swap to an automatic and going with the 250 gave me the option of using an AOD and having overdrive, so I went that route, got a 170 x-member out of a 65 and aftermarket tranny member w/ 8" drop. 9" rear end from a 65. Like I said 64 was the first year of an auto option and it's a unique configuration, easier for you to stick with it unless you just gotta have overdrive.