F1Tommy, Yes the Judd V10 is a very sweet and reliable engine and is correct for BT60B-04. Brabham used Judds both before and after the ill fated Yamahas. One of the beauties of having a Judd engine is that they are still in business so knowledge, advice, parts, service and full rebuilds are all readily available. John Judd and his staff at Engine Developments were very helpful to us during our restoration of BT59-05. John Judd and Sir Jack Brabham actually founded the company together in 1970 after Brabham stopped using Repco engines. So much history! I actually had fantasies of restoring BT60Y-03 if I could find a correct Yamaha engine. I searched for a couple of years to no avail. The story I got was that Yamaha took their engines back and destroyed them. I am told that the new owner of this car has found one and is planning to do a full restoration. I am really happy that another historic F1 car is being resurrected!