Craig - You can purchase a crankshaft snout drilling kit from a number of vendors. Here's one that will work with your 235 (and many other engines):

12Bolt LLC Crankshaft snout drill kit (and it's made in the USA!) thumbs_up


~ 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)