Just an added suggestion, but who manufactured/sold the adpater plate for your 261 to Turbo 350 match up??? They would be the one to reach out to for a starter suggestion IMHO.


~ Dan
1951 Chevy 3 window 3100
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"My Grandpa Carl's Truck and How it Became Mine"
1966 Chevelle (Wife's Hot Rod) | 2013 Chevy Silverado (Current daily driver)
US Army MSG Retired (1977-1998) | Com Fac Maint Lead Tech Retired (1998-2021)