Ok so I checked it out today and damn do I ever feel stupid.The linkage couldn't move all the way forward because it was hitting the header flange. I don't know how I could have missed that, but it shouldn't be a hard fix I just gotta pull the header find a new flange to weld on and cut the collector down a bit.

So does anyone know how to make the tachometer work on one of these swaps or what?
1991 Silverado-L33 5.3L, 212/218 .557 .562 115+4, ASP under drive pulley,180* thermostat, 90mm truck intake w/ LS3 throttle body. Shoenfeld conversion headers and duel Flowmaster exhaust. Performabuilt LVL 1 transmission and 23-2500 stall converter.