There are a bunch of guys here that have changfa 195 and larger.. I do not have experience with those larger one's, but from what I have read here, they most definately can pull there weight.. Also from what I read they are used and abused around the world.. Look pretty easy to rebuild them if/when needed. And parts are fairly easy to get especially for the larger engines..
Probably be expensive to ship a container full of them here tho. As shipping prices have gone thru the roof in the past few years..
If you do decide to order a bunch, I wouldnt mind a R175-R180 type to purchase from you.
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Hope you can pull it off as their is probably still a decent market here in the states for these engines..
If you can get by the supposed ban of these engines here..