id tuck the 401 under the bench for now and hold onto it for later. Those are real cool engines. I'd just snap up a 360 magnum and drop it in. A whoooolleee lot less headache.
Save the 401 for something like this
https://www.youtube.com/watch?v=apkabagfkie
https://www.youtube.com/watch?v=mxtehelhveu
