Lost brake prv :-(

Hi all, when I stripped my old RR for parts I seem to have lost the brake pressure reducing valve and now I'm building a hybrid I need another one, I can remember it was small cylindrical device in the brake line but the diagram I have for the '86 model shows a different device with 5 ports so I'm a bit confused to say the least!
I don't have ABS in my truck so need some help to be able to pipe in my brakes, I'm busy rebuilding the calipers just now ready for refitting once my new seals arrive.
V8 EFi 85 - 90 seems to have the one I remember according to my research but I don't have a diagram for this setup.
Thanks
Graham

OK found a diagram looks like I need the prv and a 3 way connector, anybody got part numbers for these items?
Graham

Dont worry all sorted now PRV and t piece on order.
Thanks
Graham

Just a warning, I rebuilt my front calipers on my P38 with so called OEM seals. just over 12 months later, they were leaking. Turned out the seals and dust caps were full of cracks. Obviously wrong materiel had been used.

Thanks for the warning, I purchased mine from a long established supplier who I have dealt with for decades so hope these will be OK they were Allmakes brand made in India with a long history of rubber manufacture so fingers crossed they hold up OK.
Graham