Here is some Vista info

 

      Year Wheelbase Base price Production     Available Engines
1964     120" 2938 14000     230hp,290hp 330 ci
1965     120" 2937 31965     250hp,315hp 330ci
1966     120" 2914 26606     310hp,320hp 330ci
1967     120" 3135 27554
1968     121" 3367 36143
1969     121" 3457 33387
1970     121" 3636 34094
1971     121" 3865 29883
1972     121" 3774 31913
1973     116" 3837 24425     180hp 350 ci,        250hp  455ci
1974     116" 4294 8485     180hp 350 ci, 230hp 455ci
1975     116" 5001 14189     170hp 350 ci,190hp 455ci
1976     116" 5041 20560     170hp 350 ci,190hp 455ci
1977     116" 5243 25816     170hp 350 ci,185hp 403ci
1991*     115.9" 20495 7663     170hp 305 Chevy
1992*     115.9" 20495 4347     170hp 305Chevy,180hp 350Chevy
* denotes Custom Cruiser