Originally Posted By: Twisted6
The Bad thing about the 194 even knowing It has the same crank as a 230. It can NOT be bored enough to turn it into a 230 because it would need to be bored OVER .125 And you would still be under a 230.
yes they are 8.5-1 and was 120 advertised HP and depending on the year came in between 4000 & 4400 rpm and TQ was 177 @ 2400

I have owned many Nova/ChevyII's from 62-70 Two of them being SS my64SS L6 and MY 69SS BB 396


Indeed. Conventional wisdom tells us that over boring (an in hand casting) beyond an 1/8" is a no go. That is why casting number 3788406 is on my bugaboo list.

Here we have the Corvair Chevy II Parts Master documenting this casting number as the identifier for a 194 replacement block with fitted pistons group 0.033 GM Parts Wiki - Oct '62

Yet here we have the main Chevrolet Parts Master documenting this same casting number as identifying a replacement block with fitted pistons for the then new '63 230: GM Parts Wiki - Oct '62

The only difference is the catalog numbers:
3792489 fitted to 194 cu/in
3828990 fitted to 230 cu/in

Which suggests that this casting number has lots of room for over-boring in 194 spec and likely very little room for over-boring in 230 spec.

Curious.