Mating transmission to clutch - Would like helpful tips

[CPNE]

I've never had much luck aligning a flywheel/cluch to a manual transmission with the transmission still in the truck. I'd like some tips or tricks anybody else has used in a similar situation. He's the background.

1. Engine is 402BB to 4 speed top loader.
2. Clutch disk has been aligned with a clutch alignment tool.
3. front clip is off and tranny has been unbolted from xmember and suported with a jack.
4. The engine is in correct position (set correctly on engine mount towers).
5. Transmission is in neutral and all bell housing to engine bolt holes line up.

Problem is there is still approximately a 1 inch gap all the way around between bell housing and engine (tranny has slid back this amount because engine is on mounts correctly). We can't seem to wrestle it on any further because of no leverage (truck is on ground).

Questions:

1. Is it safe to assume the trannys shaft splines are lined up with clutch and flywheel with both pieces this close together and lining up?

2. Would it be wise to pull the 2 pieces together using the bell housing bolts to force them together (as leverage)?

3. Any other suggestions? I'm not keen on R&Ring tranny as it means jacking up cab to get it to slide in place when bolted to engine (been ther done that). Also its so close after 2.5 hours of effort to get it this close, I hate to start over, but I'm not keen on breaking anything either.

Thanks