Yes there is an adapter for such. I've mounted one behind my 248 on my '54 GMC. I haven't put the cab back on yet so I don't know about clearance problems.
I haven't worked out the details of the throttle valve cable yet either but there is lots of info on the web. tvmadeez
Can't help you about the ps pump.

"It's just a phase. He'll grow out of it." Mama, 1964

1956 Chevy 1/2-ton 3100
1953 Chevy 6100 "The Yard dog"
1954 GMC Suburban Now with a new proud owner.