If they offer you the model with the Heinkel engine run away - flying deathtrap. Having flown both some German pilots are said to have preferred the Buchon (with a late model pressure carb Merlin) to the original.
I'd suggest the fairings (bulges) at the back of the cylinder banks are for the timing chain runs for the overhead cams.
The standard motor for these was an inverted v12 DB6xx often latterly fitted with MW50 and or the ha-ha Gerat (ha-ha device) which provided nitrous oxide or laughing gas boost.
And just as an aside - if someone makes another Meteor based car it *isn't* a merlin. A Meteor is a n/a merlin block with a totally different (2 valve) head design that'd be hard pressed to make 650hp displacing 24 litres. A Merlin is either 1 or 2 stage supercharged with a "4 valve" head displacing 27 litres. I know, nerdtastic but it bugs the hell out of me.
Biting the hand that feeds IT
