which is the easiest of these swaps? Will the 4th gen(1996-1997lt1,2000ls1) motors bolt right to my 700r4 tranny and 305tbi engine mounts? will i have to change rear end gears(mine are stock, donno what they are;its a 91 camaro rs with a lo3,someone wanna let me know what my stock gearing is and what it needs to be for any or all of these swaps)will i need a new tranny or will my 700r4 work? any reccomendations(preferances) on these three would be great. also my tranny is automatic

 

L98 is the only bolt-in for your engine mounts and trans. LT1 adds cross member clearancing or AC delete, wiring, plumbing fabrication. LS1 doesn't even have the bosses on the block for your engine brackets. The taller your gear (numerically higher) the stronger it is. You don't "need" a gear change.