Yeah you're on the right track, with a blow through the the carby is after the turbo, i.e the turbo blows air into the carby to mix with the fuel, you can also put in an intercooler with this type of system. Draw through(suck through) the carby is before the turbo, so the fuel is sucked through the turbo and then into the combustion chamber.

You need to either get your hands on a turbo manifold(like frankthedolphintrainer's or otherwise) or use whats called a 'J pipe' which is bolted to the factory exhaust manifold.

For a suck through(draw through) it is recommended to use a 1 3/4 SU or stromberg carby but a side draught webber can be set up for a cost by a carby speicalist.

Oil for the comes from the oil filter housing, you need to put a t-peice were the oil pressure sender goes and run an oil line up to the turbo oil inlet. You also need to weld a peice of pipe into the sump for the oil return off the turbo.

You'll need to take it to a exhaust place the get the dump pipe made up and you might need to get the rest of the exhaust done depending on your existing exhaust system.

Thers some other bits and peices, but they are the major bits to consider. anything else you would like to know just let us know.