The Pontiac 230-6 was a single overhead cam six, about the only Chevy parts that interchange are the crank and rods. Later a 250 cube version was built, the Pontiac OHC-6 was discontinued altogether after the '69 model year. The Pontiac 215 offered in '64 -'65 was essentially a cam-in-block Chevy 230 six with a Pontiac-specific bore size, 3.750" for the 215 vs 3.875" for the 230.
I got one in my chevy truck ('63). Still trying to figure out how the pontiac 215 ended up in my truck. oh well. View attachment 314757
My chilton book shows 65 as being the first year.for the novas. And i have owned them all from 62-70 and i have never came across a 230 in any before 65. But Date codes/Casting numbers may show differently I hope these casting numbers help.(3788406) 62-69 3850817 62-78 being 230 or 250 3854036 Chevrolet/Olds/Pontiac 62-76 230-250 3877178 Buick/Olds/Chev/Pont/GMC 62-78 230-250