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40 Deluxe · 08-20-2010, 03:46 AM

[QUOTE=The 8N and the Mod.A engines are so similiar that I believe whats good for one will be OK for the other (Generally). From that, I had some worries about HC heads. My fears were not supported.
Terry[/QUOTE]
Actually, it is the 239 cu. in. flathead and the 8N that are similar, NOT the Model A. Bore and stroke of the 239 and 8N are the same (8N displacement is 119.5 cu.in., exactly half of the V8). Pistons, rings, spark plugs, valves, springs and lifters interchange. The front mounted distributors are similar in design. Both have pressure oiling and insert bearings (main and rods). NOTHING interchanges from the A to the 8N! The A design is 10 years older than the 9N/2N/8N. The N starter interchanges with the 60 V8 starter.

08-20-2010, 03:46 AM	#33
40 Deluxe Senior Member Join Date: May 2010 Location: now Kuna, Idaho Posts: 3,789	Re: High Compression Head [QUOTE=The 8N and the Mod.A engines are so similiar that I believe whats good for one will be OK for the other (Generally). From that, I had some worries about HC heads. My fears were not supported. Terry[/QUOTE] Actually, it is the 239 cu. in. flathead and the 8N that are similar, NOT the Model A. Bore and stroke of the 239 and 8N are the same (8N displacement is 119.5 cu.in., exactly half of the V8). Pistons, rings, spark plugs, valves, springs and lifters interchange. The front mounted distributors are similar in design. Both have pressure oiling and insert bearings (main and rods). NOTHING interchanges from the A to the 8N! The A design is 10 years older than the 9N/2N/8N. The N starter interchanges with the 60 V8 starter.