Marcos Maniacs

Hi, I'm new here.

My father has a 1973 3litre Volvo Marcos.  He has totally restored 
it (re-trimmed, resprayed, rewired, twin round headlamp conversion 
and round rear lights).

I set the twin carbs up as best as I could, but wasn't happy with 
it, so we took it for a rolling road session.  The dyno guy managed 
to get the car running a bit better, but the main problem seems to 
be the nasty inlet manifold/carb layout, with two carbs for 6 
cylinders.  Cylinders 1 and 6 look like they will probably run lean 
because of the tortuous route the fuel has to take to get to them.

We had to set the car up quite rich to get it to run nicely - we 
measured 136hp at the rear wheels.

I wondered whether anyone has ever tried to fit triple carbs to this 
engine in a Marcos - looks like it might be quite tight, but it may 
just go.  Alternatively, has anyone fitted injection?

Long-term, we will probably tweak the engine a bit, aiming for 180 
to 200hp (flywheel) - any tips appreciated.

Martin