I feel for both sides of the situation. We all know the drill, there are three sides to this story. His side, Mofoco's side, and the truth.
If it were a speedster or a subi powered MG then maybe I'd grab my pitchfork and torch. 
Ok everyone, the list just keeps growing on everything that MOFOCO touched.
A brand new engine, turn key. Right! I did a compression test and here are the results.
#1 100
#2 95
#3 90
#4 90
I found the shifter was removed and the reverse lockout plate was turned. The shift rod support bushing bracket was broken off and coupler loose.
The transmission could never shift with work like that.
So MOFOCO says they had four people working on my car for the seven, (7) MONTHS it sat there for a two day engine swap.
Now get this! I removed the exhaust header to remove the valve cover to check the valves, and the exhaust stud fell out! YEA, fell out! MOFOCO tried to put in a Helicoil and failed miserable. Not only did they screw up a new head, they screwed up the repair!
Just to let everyone know how many things MOFOCO screwed up.
1. coupler installed way to loose
2. lockout plate was reversed
3. open wires grounding out points from coil to distributer
4. melted spark plug wire on exhaust
5. exhaust headers loose and rattling
6. carburetor intake manifolds nuts not tight
7. carburetor manifold gasket leaks
8. stud on exhaust falls out
9. oil pressure sending unit not installed from original engine matched to SW gage from 1980.
10. low compression on all cylinders
11. TDC pulley does not line up with #1 valves closed when #2 valve rocks. 60 degrees off.
12. Turn signals wiring broken while trying to fix the oil pressure gage????
13. All the wiring crimps MOFOCO tried to do fell off. Did not strip the wires.
This is just a partial list of things found broken or wrong.
Along with all the other damage to my car, paint scratched, grease everywhere, windshield scratched, seats and center console damaged by parts thrown in car, with people like this, who needs enemies?
http://youtu.be/BbHmmG5qEuY
does this sound like the same engine?
http://youtu.be/cw8LUTanNVo