Long story short, I bought an E12 with an early (~1977) Callaway turbo kit on it. At some point, the turbo wore out and started dumping oil in the exhaust, but they didn't realize that until the engine had been swapped out for another nearly identical Callaway turbo engine/kit. So, now I have a very rough turbo E12 and a complete spare engine and turbo/kit. However, the spare turbo (the original) is worn and needs to be rebuilt. I am aware that these early Callaway kits are rather limited, power-wise, but I am currently content to keep it, especially since it's an AiReseach turbo and not a Rajay turbo as I had feared (due to the Rajay wastegate).
However, I am having trouble identifying the turbo. I cannot seem to find any sort of parts or service manual for it and there is no tag riveted to the compressor housing, only a few stamped numbers and a cast "To4" and "A/R 0.60". Does this turbo use a common CHRA that I can get a rebuild kit for, or am I stuck trying to find a competent turbo shop?
Thanks!
