OEM Torque Converter
 

i'm wondering if it's still possible to buy an off the shelf factory converter for a '68 327/300 with 3.36 rear. or is this an ebay/craigslist/wtb kind of thing. googling just brings up hits for a million after market converters and none of the vendors i've checked seem to stock them. any info much a appreciated, thanks.

Are you looking for th400 converter? I do have one i replaced with a TCI one. The stock one was working fine when removed.

johns, that's a good question. i did a little research and the consensus seems to be that all the early C3's came with the th400. but there are also references to th350's as well. and '68 is the last year of the 327 and the first year of the 3 speed auto? i'd be great to get a little clarification.

They used TH400s until 1976 or so when they switched to TH 350s

let me back up. i'm gearing up to put a th350 in a '67 coupe and i think i have just about all the parts i need figured out. except the converter. i realize i could by an after market converter of the shelf but i've had bad luck in the past, even with custom built. and shipping them back and forth can get spendy quick. so since the '68 is basically an improved '67 with a different body the converter should be a good match if the '68 has the same drive train specs. i hope. i wonder if it's possible to get a gm part number for that converter to see if it was used in later cars. i kind of doubt it since they went to the 350 sb the next year.

and just to be clear, the '68 did not come with the power glide? i occasionally come across references that state that corvette didn't get the th400 until '69. like this one from hemmings:
https://www.jalopyjournal.com/forum/...rticle.228842/

The rear axle ratio is not relevant to the torque converter specs. The torque converter needs to be matched to your engine's actual torque capabilities AND the stall speed that you select. IMO, going for a 40+ year-old item is not the best choice. Modern TC's are lighter (better materials available) and stronger (if a quality product is purchased) than original equipment components. The tech support at most of the better brand TC makers can advise you as to which unit is best for your car, once you describe how you want to use it.