Have sort of finalized on the engine setup I want in the car. Have decided I want to keep the car looking relatively original but want the larger capacity of the later crossflow engine. The solution is to build a bit of a hybrid engine that uses the latter 711M block but fit the early crossflow head onto it. This is almost dimensional the same apart from the block is about 10mm taller.
Having made the decision I acquired a 711M block along with a new inlet manifold as I wasn’t happy with the quality of the one I had to assemble the parts to see if it would all fit.
Not really surprised at outcome it all fits together but the bonnet no longer closes! Looks like some modifications will be required as I always knew fitting twin Weber’s would be a challenge.
