You can do this very easily by simply fabricating a 'J' off your standard exhaust manifold using plumbers steam pipe steel bends, and drawing through a 1"3/4 SU carb.Forget about intercooling at this stage and at 8lbs boost with conservative spark ( max. 30 degrees total advance ) you will have a very lively, reliable street powerplant.Big things are not to overboost, overspark or underfuel. A T25 or similar would be ideal as long as it can handel a draw through.
A nice, free flowing 2 1/2" or bigger exhaust tail pipe is also required.
The easiest and probably the most efficient inlet manifold is to get some to fabricate up a log type out of exhaust U bends meeting up to a top tube that is fed from the middle ( hope this makes sense )
A 1"3/4 SU is capable of flowing 300hp worth of air and fuel and very easily tuned so are an ideal ( if not slightly old fashioned ) way to go.
As far as engine mods go really at that boost do nothing other than make sure that the head gasket as well as the block and head surfaces are good, and of course the valves are all lapped in nicely as well as some good valve springs.
A oil feed to the turbo from the oil pump ( for Gods sake make sure that its FILTERED oil and of course a drain to the block.
Simple, easy and very effective.
Performance- done nicely it should be good for low 14's through a quarter mile.
Cheers
Dave