Good idea, Sixto, loosening the AC compressor *might* provide a little more wiggle room.
To pull the IP, basically you just remove the vac pump, install the timing basket (if not present... the basket may be there on 1986/87 engines, not likely on 1990-up), set crank to 14° ATDC, remove pump. To install, turn the pump shaft slightly until the tang is centered in the hole in the side of the pump, insert lock tool to lock the pump, and re-insert with the crank still at 14°. You may need to move the turnbuckle thingy a little up or down, since the position may be slightly different than before, to allow the pump to seat against the block.
Two very important things to remember:
1) When installing the pump, it must seat up against the block without using the bolts to pull it into place!!! It MUST seat by hand pressure. If you are using the bolts, something isn't aligned, and you're likely to break off one of the mounting ears.
2) After the pump is seated in the block and bolts are finger-tight to hold it in place... do NOT rotate the pump, or engine, or turnbuckle... with the lock tool installed! This will break the tang off on the back of the camshaft, inside the pump. When it's in place, tighten everything down, REMOVED THE LOCK, then rotate the engine 2 revs back to 14° and double-check that the lock will still engage. If not, loosen it up, adjust slightly with the turnbuckle until the lock engages. Repeat as necessary. It's a lot easier with the "A-B light box" but that costs 10x more than the lock tool.
