Jeeps and wranglers really don't need specific talyer kasi they were generic built. Yung unit mo doesn't really look like the old CJ (civilian jeeps)...to know if it was the original CJs way back in the lates 70's and 80's you will have those metal emblems na nakalagay ang specs ng oto and your CR will have that info (series number ng CJ chassis) that if you try to search sa mga US Jeep/CJ forums will confirm these numbers.

AFAIK original CJs are gas engines inline 6 cylinders and never diesel engine. Original diesel jeeps (specially mitsubishis) were from late production MJ (military jeep) na high-hood kung tawagin.

Yung binangit ko na shop #1 sa Magalang avenue seems to be the Dungca shop na sinabi rin ng isa pang tsikoteer. I have no personal experience with them but they might be a reliable shop for your rig.

If you can find Mr Larry Mendiola (lives somewhere in AC) pede mo rin siya sigurong mapgtanungan. Mr Mendiola is a seasoned off-road champ na lumalaban na sa labas ng Pinas at nakaka top 5 or better pa sa finish. AFAIK his original rig was an LC70 built through his specifications was used in his first Malaysian Rainforest Challenge.