Some misc bits I have...1/2 BSP probably from a Titan FF over the years
the center one would screw into a Titan side mount pump, using the washer to seal
titan side mount pumps use 1/2 BSP, I would assume the front ones are the same
if that blue fitting you have measures .81 thread OD, non tapered, it's 1/2 BSP
personally, I'd go aeroquip, just because you can get it everywhere
Pegasus has some fittings/adapters
this may help---
https://www.pegasusautoracing.com/document.asp?DocID=TECH00098
is this the car I've seen at Blackhawk?