Rick Stauffer

I really appreciate your responses. Very helpful. R

Again thanks for the information and your patience in this dialog. Best I can see is a casting number 1557582 (see attached)--would that suggest a 289 block?

Would that be visible without removing the cylinder heads?

Thanks for the responses above. From those, I assume the cast in number at the right corner of the block isn't helpful. Given that this mystery motor is married with the supercharger and a 4-speed and that the car was at one time used for racing, is there any chance that it could be an R-3? Needless to say, I appreciate your thoughts.

Thanks for the response, I was unable to see an engine number on the top of the block left front (see attached photos). Any thoughts on where else to look? Much obliged, Rick

I have a 1963 supercharged Avanti with what a believe to be a replacement engine. It has the same stamped numbers as the block that Tim G is writing about (see photo attached to this post). Is it possible to confirm that this is a Studebaker block? The 3.6" bore on Tim G.'s block conforms to what I read for specifications of the original 289 R-2 engine. Were the originally installed engines stamped with unique serial number? If so, where would I locate it? If indeed mine is a replacement, would it have a unique serial number and if so where? .