Skooter,

Glad you were able to find it finally. thumbs_up

Lots of different sites (inliners, VCCA, etc.) decode that as a 235 for sure, with some specifying 53-55 1st series, 53-54, 54 only or 55 1st series only (guessing that may have to tie in with the casting date codes to define better).

Either way, definitely a "235". Your internal inspection should lock that in tomorrow.

Have a good night! wave

~ 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)