Thanks Romeo85
There is a large gap in front of the oil cooler between the 164 subframe and the Sprint cross member - I want a large volume of air circulating in the engine bay and it will exit through additional rear vents and spoiler into the low pressure zone at the rear. If it does get too hot then I can move the cooler to the front later. Also it is a limited use road car
Not a race or rally car.
I know about building a full tube roll cage/chassis but wanted to use as much Alfa as possible and my way keeps all the alignments for the suspension/engine/gearbox assembly. The 6C photographs that I have seen do not show much detail but there was not a full tube chassis in them - also most cars are made with monocoque construction and, with this engine location, it is now in a much more central position with the loads shared to the rear "C" pillar as well as to the central "B" pillar region. In the 164 and Sprint all the loading had to go through the "A" pillar and front bulkhead.
I actually have spent quite a lot of thought about this project.....I cannot pour pots of money into this project and it is being made in my garage - not a workshop - by me!-- this is the challenge and the satisfaction.

Latest pictures attached.