It that time that I tune up my guitar and play the 'I need a hydrovac or a rebuild kit' blues.
I both the late single piston and early dual piston 'vacs now... so any kit would help.
VoV seems to have parts... they are on the list to email/call.
I did find this place: http://alrettatruckparts.com/
They seem to have a bit of a history with antique vehicles... will be calling them Monday.
Jim Carter has a later vac:
http://www.oldchevytrucks.com/cart/prod ... drovac||||
for $595, but you get $270 back with a core.
Will have to take off the single piston I have and see it they can take it. I have a massive Third series spare.. but I think that master cylinder may not have enough CC's to actuate it...