Re: 1978 Chevy K20 longbed with nearly 500,000 miles! LS Swap begins!
That's the 11in "oil bath" RPO code, haha
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1999 GMC Suburban K2500 SLT, 454/4L80E
1991 Z/28, 6.0L/T56
1949 GMC 250, S10 Frame, 6.0L/4L80E
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