Custom EFI manifold design

[Wes Branchflower]

Hello everyone again, my second message!
I need some advice on my custom EFI project. A lot of the information I have 
seen has been more about the 'software' side of EFI, and not much about the 
'hardware'. (by hardware i don't mean chips etc, i mean manifolds, fuel 
pumps etc)

I wrote a message a little while ago, where i don't think i included enogh 
information to get a good reply.

I have a 4.3litre Six cylinder (265cu.) Chrystler hemi motor.
For those people not from Australia, these motors were in the Chrysler 
Chargers (1972) Factory the R/T Charger put out 226kw.

The stock 2bbl carby intake manifold i have, splits of into 6 runners 
ranging in length from 10cm to 25cm.

The intake runners are square, with slightly rounded corners. The hollow 
insides measure 38mm X 38mm, with a 47mm diagonal measurement.

My aim is a compromise between high performance, and street driveability. 
Could some wise person, direrect me (the young and misguided fool) in the 
right direction for my EFI conversion?

I plan to make a new intake manifold from scratch, i just need some help 
and/or formua's for designing the manifold.

>From previous replies i was told just to use a single throttle body, (70mm 
diameter), but i don't understand why? The 70mm throttle body i have is off 
a 4.0 litre Ford motor. But the hemi is a 4.3 litre? It's not uncommon to 
have one of these sixes at 7000rpm.

thanks to everyone in advance.
Cya!
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