Everything is in the title. Brakes locked up on me. Need calipers or recommendations

For replacing. Anything compatible? Got a buddy that may help me retro fit something newer but I like stock. Anything helps.

Take them apart and clean them out. If the pistons aren't pitted, you can just replace the seals. Not that complicated.

Thank you. Thats an idea I got sent already. Worried they may be pitted beyond repair I'm in a rust prone area

Can't hurt to have a look. Most of the time, they're just packed with dirty goo and stuck. 

 

Take them off the mount, but leave the line connected, and pump the brake pedal to pop the pistons out.

 

Use some fine plumbers strapping cloth to clean any rust off the pistons.

Upgrade to vented rotors & calipers from an EA81 chassis

I got calipers for my 78 at AutoZone.