they can do either one, altho im sure shipping your block to them is gonna cost a good penny.
2003 Mustang GT
NMRA M.M. 7337
best to date: 11.79 @ 110.78 mph let off at the 1000'
3260lbs with driver on above run
NEW: holley hp efi and magnafuel 750
Goal: 10s on stock longblock
2008 mustang v6 DD
bamatune, jlt intake, flowmaster outlaws
2011 8.8 rear 3.73s
full upr products rear suspension
14.31 @ 98 mph *before 8.8 was installed