RB20E to DE .. ?

[crossbread]

hi all , im new here , Im from the manawatu New Zealand and someone wants to swop one of my cars for there 1987 Holden Berlina RB20E manual.

A lot of my mates have skylines with RB20DET , RB25DET, and they go great .
I expect a big old holden with a 2L single cam na will not go so great...
so was wondering if i could simply bolt a RB20DE head on my RB20E ... and then get a T manifold and turbo it...

so can i just bolt this head on ?
will the compreson be wrong for a turbo ?
I dont care to much about the turbo at the moment , but i think I want a DOHC though

anyhelp is much apreciated. Because I dont think I will get this car if the modification is to hard...
I dont want to spend much money as the car is just for until the end of the summer.

cheers

[soop]

Why not get an RB30DE?

Surely it wouldnt be too hard even if you had to source one in oz?