425 Cadillac into a Stroker 454
No, you're wrong. The 425 Cadillac engines were produced by General Motors
from 1977 through 1979. They appear to look almost identical to the 472 & 500 c.i. engines that were produced from 1968 through 1976. The 425's shared the same engine code as the 500 c.i. engines, that be; "S" code for the carburetted
versions. Check with Cadillac history before assuming something that's not correct. The 429's were produced from the early 1960's through 1967, not at all
the same as the 425's!