Anyone swap in an lt1 with the original sm465?

[Ofnaman1]

I have a low mileage '95 z28 sitting in my yard that a co worker gave me. It runs great but has body/interior issues. Anyway, I am planning on putting the lt1 into my '72 k20. It has a sm465/205 combo in it that is going to stay in it. I will be on a time crunch to get it installed, so I could use any advise as to if there is any real differences between the original small block and the lt1 as far as mounting goes, specifically with the manual clutch linkage and flywheel/starter. The camaro is a manual trans, so it already has a flywheel, but I do not know if it will work for my application. Thank you in advance for any help.