Re: 4L80E and case ????
Jake's Performance has a Faq page. It doesn't come out and say it but it implies that older cores are used with newer LS engine…thereby implying that, yes, an older core will work with a newer computer….
The Neutral Safety switch may be an issue depending on the year of core.
http://www.jakesperformance.com/4L80E_FAQ.html
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1972 K20 Suburban 5.7/700r4/NP205 Dana 44/H052 Sold 
1972 C10 5.3L/4L60E 12bolt 5Lug - Sold 
1971 K5 Blazer 6.0L LQ9 4L60E NP205 Dana 44/H052!!! 
1970 K3500 1ton CrewCab 8.1L/Allison1000/NP205 Dana 60/14B!!!! - Sold   
1988 V30 CCLB 7.4L/TH400/NP205/Dana 60/Dana 70!!! (Sold) 
2003 K2500HD 8.1/Allison1000/NP263
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