The intercooled models use a Sanden SD709 compressor which has individual connections. The non-intercooled models use a C-171 (?) compressor which has a flat flange.
The compressors also have a different attachment to the water inlet connection (mounting bracket) on the block. If you wanted to switch the intercooled compressor, you would need the water inlet connection from a 91.5+ engine. As well, a shorter serpentine belt as the 91.5+ bracket puts the compressor a hair higher than with the other.
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1990 Dodge D350
Giles' 12mm VE - Airdog II 165 - 370s @ 75lpm - BW S362fmw/68/12 - Hamilton 182/214 - '01 NV5600
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