Aside from finding the parts which would be relatively easy within the 3800 community. Do you have the resources to performer such a swap?
I've thought many times about buying a old Berretta or Celebrity and swapping in a L67. But I work in a machine shop so I can make anything I need on a manual mill/lathe or CNC in a heart beat and our master welder/fabricator in our shop is always willing to help on a cool car project. Not to mention my boss owns an auto repair business and I can use the lifts and mechanics tools as I please.
1998 SSEi The Executive Hauler
Built Trans w/ 3.29s, P&P Jenny 5, S1X cam, Silver TOGs, Northstar TB & LQ4 MAF, FWI, Dyno tuned, #60 injectors,Oil Pressure Kit, 2.9-3.4MPS, MagnaFlow exhaust, 3" HF cat, MSD Coils & 8.5mm Super Conductors, AeroForce, only Sunoco 94, 100