Last weekend I pulled my 912 engine out of the shed to get ready to take it apart and see what was useable in it. When I opened it I found that even though it was a 1967 engine the crank was counterweighted. I am going to use the crank, rods, oil cooler, distributor, oil filter, and some small parts that will give my engine a performance look. I will be able to sell the case for enough that I will make money on the engine and have a few hundred dollars worth of useable parts.
The 912 crank has a 74mm stroke where as the stock would be 65mm. To use the 912 crank I have to use 912 rods but the stock piston uses a different sized pin. The only piston that is the correct bore that also has the same pin diameter in the correct location to limit the cylinder spacing is a 1.6 miata piston proving miata is the answer to everything. I am going to have an 1413cc engine and hope to make 50-60 hp with it. I plan on running in the 36hp challenge with the car when it is done.
In this picture you can see my crank, an early nos mallory dual point, a set of nos Thompson Automotive aluminum high lift rockers, a nos empi inch pincher cam gear, and a special made 6mm stud high flow oil pump for early engines.