The only F1 chassis Shannon Racing Cars made had steel monocoque frame, upper and lower wishbone front suspension with outboard brake, and anti-roll bar.
The Coventry Climax 2.5-litre FPE Godiva V8 engine used in the Shannon had been built 12 years earlier in 1954 for Kieft F1, but was not released for a lack of proper fuel injection.
The entire stock of parts was sold to Andrew Getley, who permitted Paul Emery to convert one unit to the 1966 3-litre F1 format, which required it to run on pump fuel as opposed to the original alcohol.
[1] Paul Emery bored out the engine, used a Tecalemit Jackson fuel injection, and the 2-valve gear-driven DOHC 3-litre crossplane V8 made 312 bhp at Chrysler's dynamometer located in Kew.
[1] A petrol company sponsorship was promised but fell through, and SH1 received a 1-litre Cosworth MAE built by Holbay (later by EMC Motorsport), fitted with two twin-choke diagonal throat sand-cast Weber carburettors for Formula 3 racing.