but anyways quick guide to dropping a C20LET into a corsa
shopping list
modified drivers side mount bracket gearbox spacer plate driveshafts original corsa mounts suitable cv's complete C20LET engine with all wiring ecu fuel pump manifold etc gearbox(F28 with FWD conversion kit(circa 50 quid) or a F20 exhaust 2 suit corsa gsi rad induction kit cone filter
start off seam weld the entire engine bay up basically where chassis meets bulk head where the legs meet the front cross memberaround the turrets and bottome arm mounts suggest also considering a strengthing kit for the conversion harry hoclkey supply the nova ones try em for the corsa variants :)
give the engine a once over clutch water pump tensioner etc etc you also need togrind off the lug on the end plate of the gearbox so that it doesnt foul the tiebar
now you can put the engine in from underneat(easier if you remove the ARB first)
now you can start wiring the engine loom into the cars shouldnt be too hard basically its only a dozen wires fit the fuel pump as close to the tank as possible and away you go
you might want to junk the ARB at this point as you wll need to space it to get it to fit properly again and you'll find the car will prolly handle better without it due to the increased weight over the front wheels :)
any more help needed ie wiring diagrams gimme a shout :)
HTH
Rob