I would go with a cable type throttle setup, either off of some existing car or an aftermarket, like Lokar. So much easier to rig up. You might have to do some bracket fabrication on the carb end, but nothing impossible to do.

One out on the clutch linkage would be to fabricate a bracket that bolts into some existing holes, like on the bell housing or side of the block. Again, you just need to look at what is needed to anchor the end there and build some bracketry to accomplish that.

How far off is the crossmember? Sometimes you can add a plate to extend the area where the transmission mount goes, weld that in place, and then remount the trans mount onto that plate. I had to do that when I swapped a 5.0 engine into my Jeep pickup...........some 3/8 plate about 6 x 6 inches, welded to the old crossmember put it where I could mount the trans mount.

Swapping one engine into a different car or truck is just a matter of knocking down one problem after another to make the two work together.

Don