Originally Posted by ES_97Sport
Some corrections ...

Chevy K20/K30 Truck '77-'86 Metric 3/4 ton calipers
RAYBESTOS FRC4156, FRC4155 D370

These are not D52 pad format, but D370 which is slightly different. Rotor thickness specs for these calipers is the same as my D52s - 1.29" max & 1.21" min. The rotor diameter is 12.5" instead of the smaller D52 11.87".


Ok. One more time ... frown

1979-1986 Chevy K20 Suburban V8 5.7L, '82-'86 6.2L, 8,400 Lbs GVW, RPO JB7 13" rear drum

WAGNER CR98954, CR98955 GM "D52" HD - D153(metric) piston bore 3.15"
Wagner QuickStop ZX153, Friction Thickness of 0.662" (Inner Pad) and 0.572" (Outer Pad)
Centric 121-68004 Rotor (8-lug) 12.5"

Same format as a D52, but different pads. This is the 3/4-1 ton larger caliper and use the D153 pad format. Same dimensions as a D52 but thicker. They are not interchangeable.

BillaVista - 14-Bolt Disc Brakes V2

Quote
I'm going to contact Dynatrack and see how they work their D44/D60 conversion. The D370 is normally a Dana60 caliper along with the D149 (3.38") format.


Not D370. D153. Apparently also found on the 3/4 ton D44 axle.I couldn't get in touch with the correct person at Dynatrac so I'm still waffling between the 44 outers or the 60 outers. If I stick with the 44 outers, I'll use the 3.15" calipers with the 1 1/4" BMC.

Edward

'97 Montero Sport LS 5-Speed 3.5L conversion
SAS Dana 44s & ARBs, 35" Yoko Geolandar M/Ts
NP231 B4R doubler/Terra Low231/RP 5.38 229:1
'99 Montero Sport Limited 4WD SAS 3-link project
'03 Montero Sport Limited AWD
'97 Montero Sport LS 5-Speed 4WD