Computer harness - '87 Chevy/GMC Pick-Up Small Block
'87-'91 Chevy/GMC Suburban Small Block
'87-'91 Chevy/GMC Blazer/Jimmy Small Block
You will need the PROM from the 305, and possibly the computer if the last 4
digits are different.
Engine Harness - '81-'87 Chevy/GMC Pick-Up Small Block
'81-'89 Chevy/GMC Suburban Small Block
'81-'89 Chevy/GMC Blazer/Jimmy Small Block
Either '90 or '91 went to the tiny headlights so the connectors will be
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