I don't remember if mine has a long or short pump but it does have a 4 core rad from the factory. When I did my BB swap I couldn't use the pullies that were on the motor so I used a set from an 86 350. The PS pump is from a 78 BB truck. Don't know if that helps but I thought I'd throw it out there for ya...
Chuck
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90 Blazer Silverado 350w/ 700R4 and 32" Kelly's
"I am a bomb technician. If you see me running try to keep up!"
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