About 15 years ago I purchased a brand new in the box Ford Motorsport 3.85" forged stroker crank. Its not offered anymore and the original box it came in is long gone. Does anyone remember the part number for this crank? It was for a 351W but had 2.75" diameter main journals on it and 2.100" Chevy size rod journals on it. You had to use the M-6306-A351 spacer on the crank nose to make it fit in the Cleveland block. Years ago I was doing a build for my Pantera with 6.00 Chevy rods, Yates "C3" heads, and custom pistons suited for Yates Nascar heads. Never assembled the motor. I remember the piston/head and cylinder head chamber volume combo yielded about 12:1 compression. I had the crankshaft "0" balanced,so it took quite a bit of Mallory metal to do it (and cost!). I remember we had a slight crank throw to to piston skirt interference issue, and since we were adding Mallory metal to "0" balance, we trimmed each crank journal for a few degrees before and after TDC to clear each piston skirt and I think we trimmed the piston skirts a bit too. This combo was with 6.000" Chevy size journal rods. It was quite the expensive set up as the valve train used a Jesel 1.8 ratio rocker arm system with the C3 Yates heads, which had different vave angles than the Cleveland heads. I remember we checked piston pin height location closely as it was 1.225" down in the piston to fit the 9.2" deck Cleveland block.
Original Post