Easy swap is pulling out one motor and swapping it with the same motor, that might not be what you want to do.
What tranny? Is it FWD. A good tranny is the Getrag 282
you could probably swap in a 3400 or 3500 in place, should bolt right up

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Me
2000 Alero running 14's
2005 Nissan Altima (her's)
1967 Olds 330 motor sitting on a stand
1985 Delta 88 w/1968 350 rocket ( MURDERED )