Hi I am in South Africa. 

The Pic's are of the Wooden chassis 3L V6 Marcos which belongs to a friend of mine. I shot my mouth off when he said decent headers could not be fitted to his car. Bugger!!

Anyway here is what I ended up with. He is a technophobe and has just a vague idea of what the internet is (similarly a racing line)

He competes in local Historic class.

I am not sure of the geometry of any other Marcos, but there are some points which may need attention.

All the Ford axles in SA have offset pinions (+ - 40mm) yet the Marcos tunnel is central in the chassis. This car had the pinion centered and hence the axle offset by +- 40mm.

I cut up a standard axle and rebuilt it to centralise the pinion.

The other point of concern can be verified if you stand on top of the car in front of the windscreen and turn the steering wheel to full lock (or less). The Ackerman angles are completely screwy. I believe this to be the cause of the trunnion failures mentioned in various sources (amongst other prolems)

I have lengthened the steering arms +- 20mm and offset the tie-rod pickups +- 30mm inwards. Others may vary. The loads generated by the standard setup
on the trunnions must be enormous. This also sorted the heavy steering.

I have also corrected the angularity in the rear panhard etc.

Front subframe captive nuts were also crushing into timber.(really small load area) Easy to pick up with corner weights. Had to remove innner front fender wells to install doubler plates.

Very interesting and clever design chassis. A real fun challenge. Almost a pity it had to be spoilt by a steel subframe up front!!

Thanks for the build manuals etc.
Cheers for now.

JV