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Getting gas to the carbs is the biggest problem.
You could probably bypass the electric pump and get it to
work with the standard pump on the side of the block
(just take off the plate and mount the pump - DON'T forget
the plastic spacer, though - it's important!)
Use the aluminum intake manifold.
I'd suggest that you leave the FI system as intact as you can,
because it is a great system if you can get it to work.
Better performance, etc.
A fuel pressure regulator probably won't handle the pressure the
Bosch pump puts out - especially since the bypass FI regulator
won't be there to help. The electric pump can put up more than
100 psi so you need to bypass a lot of fuel to get the pressure
down to where you can use it. You might be able to do a hybrid deal
with the bypass pressure regulator loosened up as low as it will go
and then a regular fuel pressure regulator after that. BTW the
fancy chrome fuel pressure regulator I put on my 122 started dumping
large volumes of gas over my engine the other day. Fortunately I had
hooked it up with plenty of hose so I just took it out and re-did the
hose to the back carb. Working OK now.
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