The R3 and R4 Avanti had a 304 engine. Studebaker was on the ropes by the time the started building the new 304 engine and it was only used in the higher end Avantis.
Perhaps I'm thinking of the R5, after all it's been a long time. The car I'm referring to had dual 4 barrel carbs and 2 Paxton superchargers. Like I said only a few were sold. The other supercharged Studebakers used McCullough blowers.
Tony
You are thinking of the R5.
If you read about Studebaker and why it died, it had near zero to do with financial problems.
Studebaker-Worthington investors, the ones controlling it, were simply tired of being in the auto business and killed it off because they could.
It was a small group that kept them from killing it earlier than they did, plus the short term big gain they made when Studebaker brought out the first compact sedan.
Had the fiber-glass bodied supplier not crapped on Studebaker, the Avanti would have not had a large problem it had and they probably would have lasted a few more years before greed killed it.
A new larger bore-spaced block had been designed and a few prototypes cast when it was killed.
R1/2 were 289
R3/4 were 304
R2/3 were supercharged.