Yea i wouldnt bother with twin turbos, I would go for a single t3/4 turbonetics type etc with ball bearings thats rated to about 500hp.
stick a 20v head on with a clean up and cams, use the quad throttle bodies, get some nice manifolds made (I reccomend actiondan) use about 25psi+ and an aftermarket ecu and you will be near the 400hp mark easy. Guys in australia have been getting 350-400hp at th wheels with 20v heads and this turbo.
1988 KE70 Wagon - Slowly rusting 1990 NA6 MX-5 - because reasons 2018 Ranger - Because workcar 1997 FD3S RX-7 Type R - all brap, all the time OMG so shiny!
maybe you should look at buying a car.... going by the fact you need to buy a manifold as opposed to make one, tells me you will need to pay for everything on this car..... which will cost many many thousands if you want to do it right. and im not talking about $10-15k.......
but if you do go ahead..... i think you can get holleys that are made to go after a turbo/supercharger....
I HAVE THE AE92 DOWN TO MINIUM WEIGHT, FITTED A ROLL CAGE AND 20V ENGINE (ENGINE CAME WITH NO ECU SO HENCE WHY CARBS SEEM A GOOD OPTION AND THE FACT THE 4AGE AINT VERY POWERFUL)
ITS GOT A STANDRAD SILVER TOP AE101 BOX WITH LSD.
SUSPENSION WAS MY TO MY SPEC BY LEDA IN THE UK AND I HAVE A RANGE OF SPRING RATES.
BRAKES ARE ALL UPGRADED, JUST NEED THE ENGINE SET-UP.
well after spending all that money it would be a waste to use a dodgy engine set up....
i say rebuild with 4agze pistons a motec and do it properly.....
or send head to kelfords, let them do the cams and (blacktop)head, fit blacktop pistons (or higher comp aftermarket), motec and go for 200hp