The 292 should have a 2-piece lip seal that rolls out and back in pretty easily by simply removing the rear main bearing cap and loosening the other caps a couple of turns of the bolts to let the crankshaft drop a few thousandths of an inch. Some manuals reccomend staggering the parting line of the seal a little, rolling it about 1/4" off-center with the bearing cap parting line to prevent a leak where the cap meets the block. Retorque the main bearings, reinstall the oil pan, and you're good to go.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
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