Vax 6000-430 upgrade to 6000-620

Following a successful trans-Pacific trade, (for a DRQ3B) I have the following that will (theoretically) upgrade my Vax 6000-430 to a 6000-620. 2 T2054-AA 6000-600 CPUs 1 T2019 3.3V regulator, 25A Can Antonio or one of the other DEC experts confirm that there are no other hardware mods required to the Vax 6000-200/300/400 series cabinets (this particular machine was originally a 6000-310 IIRC) to support the 500 & 600 series cpu boards other than the insertion of the T2019 3.3v regulator board? ie no re-cabling etc? AFAIK this is a plug it in and go field upgrade but would like to confirm it before committing irreplaceable hardware to possible destruction. Can't seem to find much on the web about the process itself. Thanks. Geoff in Oz