General: Front Caliper rebuild or Purchase New ones??

[DaWhole9]

Before I buy rebuild kits and go down that path I wanted to see if its worth it. I bought a front disc brake system from a newer Amazon (they think its a '67) to upgrade my 64 Wagon from front drums. The system is pretty rusty BUT all the parts are there...so even if I get new calipers and new rotors, I am ahead of the game as far as cost. As I am breaking the calipers down, I was wondering are these beyond rebuilding or should I proceed to break them down, replace the pistons and seals, and repaint them. Also were there more than one caliper for the single circuit system? These have a hard line connecting each side...the calipers I see for sale do not...have those and seem to be more like modern calipers with it internally routed from one side to the next. Another reason to get new calipers (a newer design?)...here are a few pics of my calipers....

[Burdekin]

Those are the 63/64 callipers I think with the hard pipe.

[HWKWallis]

I had the same calipers when doing an upgrade to my Daimler V8 and had them refurbished; which cost wise was then cheaper than any new option and I believe I got a better result.
With my recent Volvo project I couldn't find anyone to do a refurb, and new cost is so low may well explain why.
Personally for risk versus return and time which may be better used elsewhere I would get new ones.

J

[123GT-AMAZON]

Those are Jensen P1800 front callipers you cannot and will not buy them period
Best you can get is have them fully rebuilt