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Looking for some help identifying the cam in my 40 Merc Flathead. The original ower said it was a "3/4 Race" cam bought in Detroit in the 70's. The snout is labled "Dunn" and "Detroit" and stamped "F" in two places. Does anyone recognize it? How 'bout 'Ol Ron? I checked the lift and it measures...

I bought a 53 Merc park brake handle assembly at a swap meet because I think it looks cool and I want to try grafting it into my 29 Roadster. I have a 40 Merc column and shifter in the car and don't want to mess up the flat floor with a conventional Model A park brake handle. Can someone guide...

Guys, My 40 Merc block, stamped "99" on the front right corner of the intake mounting surface, had standard bore steel sleeves pressed in. Could it have come like that from the factory? They are now scuffed so I am wondering what my options are: 1) Have it resleeved, 2) Bore the existing...

When I tore down my 40 Merc motor for a valve job, I discovered that the PO had installed head gaskets with small round holes for the center water passages instead of the style with the "keystone" shaped passages like the block has. Does anyone know what affect this has? The engine was prone to...

As mentioned in another thread, I have my 40 Merc motor down for a valve job since it appears I have some valves hanging up. I'd like to check the valve springs for proper load. Does anyone have the spec? Also can I get a recommendation for buying replacements if needed? The previous owner...

I'm running a mostly stock 40 Merc flathead with a mild cam in my 29 roadster. I'm running stock exhast manifolds with a just a short, 3 foot open pipe on each side. The engine missfires at high rpm. I've gone through the ignition and am now thinking I need to richen up the jets a bit. Can...