Canadian Flathead?

[gmanrides]

While the 51 Merc Flathead is being checked at the machine shop I went ahead and traded a SBC for this 24 stud flathead. The heads are marked C7RA-A there is no marking at the rear of engine. It does have the rear bell drilled for return oil passage but the cross port is not plugged. I did see a drawing on here somewhere showing the oiling system with an external bypass valve. It is fresh out of the machine shop but is missing the starter, crank pulley and distributor. I have a set of Navarro heads and 3x2 intake that will fit this block. I figure if I can get one or both these engines going I can pick which one suits me best. LOL.