You need to go talk to the guys at the CLC forum. It's the Cadillac and LaSalle Club of America. They help Cadillac people like Stovebolt helps Chevy truck people.

Which 390 is it? Is it the "good" one with the 331/365/390 geometry? Or is it the pre 429 version?

https://www.cadillaclasalleclub.org/page/forum

The guys on the Modified Cadillac forum might be able to help as well. The Modified chapter is a part of the CLC.

http://www.modifiedcadillac.org/

There is also a performance shop called MTS that builds vintage Cadillac engines.

Last edited by Otto Skorzeny; 01/04/2023 10:25 PM.
1950 Chevrolet 3100 (Ol' Roy)

1939 Packard Standard Eight Coupe (The Phantom) | 1956 Cadillac Coupe de Ville (The Bismarck) | 1964 Ford Galaxie 500 coupe |1966 Ford Mustang (Little Red) | 1969 Pontiac GTO (The Dishpit) I 1979 Ford F-100 | 1976 Ford F-150 (Big Red) | 1995 Ford F-150 (Newt)