22-09-2024, 08:28 AM
You will probably have to readjust the ignition timing to reduce crankshaft rumble; When I first fitted a 37 head to my RP it rumbled a lot, but it went like stink. In the interests of longevity I backed the timing off and the car is still running well several thousand miles later. I have also fitted an SU H1 carburettor. The standard manifold has had the venturi opened out in the inlet tract.