I dont think you will get much of a response since so few people have done what you are trying to do. Others will wonder why bother.
Is this a university project as it woudl be preferable to use a dyno test cell?
I have had a little involvement in turbochargin (landrovers). A lot of 4T turbo converisons run a suck through carb since trying to pressurise carbs not designed for it is difficult - steve burns etc. The Renault 5 used a pressurised carb IIRC. You will need to make sure all vents are also at the same pressure and run a fuel pump referenced to pressure. An potentially easier option is to use a plenum chamber with the standard carbs inside - effectively a pressurised carb enveloping airbox, with sealed cable entries etc
If you are only doing it for proof of concept then you can use an engine in a test stand, and run low boost pressure like 1/3 bar. Low pressure like this makes your life easier as you may just be able to pressurise the fuel tank and use easy to fabricate parts like sheet alloy for the plenum chamber or may be even fibreglass. Start out with low boost (1/5 bar), a couple of head gaskets and monitor the EGT and see what you can develop. Above a certain boost pressure you may not need inlet reeds. I guess crank seals would be good upto 2 bar boost. Dont forget extra cooling - both for the water and the turbo oil. An electric turbo oil pump may be OK for bench proof of principel tests, but I would want a mechanical oil pump for anything more serious.
It might be cheaper to use an RGV engine as parts are more readily avaiable in the UK.
Post up any pictures!
Good luck, Vincent
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NSRless again...