|Keep a sharp eye out for the nearly identical
351C D0OR-3D673-B (D0OZ-3A733-B) power steering pump pulley assembly. It too is painted
black but is stamped with "D00R-B".
Ok, so what's the difference? The difference is in the diameter. The
D00R-A, BOSS 302 pulley, nominal diameter is 6.52 inches. The D00R-B, 351C pulley, nominal
diameter is 6.24 inches. Diameter difference = 0.28 inches. Right, only slightly over a
quarter inch (1/4) different.
The 1970 BOSS 302 pulley being slightly larger
means it turns the power steering pump slightly slower than the non-BOSS 302 pulley. Ford
probably used the D00R-A pulley on the BOSS 302 due to the BOSS 302's higher RPM
capability. Don't have or can't find a D00R-A? Don't worry, the D00R-B should work just
fine for most driving applications. There are owners out there right now that have a
D00R-B and probably don't even know it. Only the true BOSS 302 expert will know the
difference when looking at your engine. We even have reports of BOSS 302 cars coming from
the factory with the D00R-B. A mistake at the assembly plant? That would never...
Vehicles that share these pulleys:
90B: BOSS 429.
D0OR-A: 1970 Torino 429 ThunderJet and without A/C
D0OR-B: 1970-72 Torino with 302/351 all, and with 429 ThunderJet and with A/C; 1970 Torino
with 429 CobraJet all; 1970 Mustang with 351C all; 1971 Maverick with 302 all.