Sounds like something to think about. You're also describing a 308 x 1.5 necked up to 35 cal almost, although this cartridge would have about 4 gr of H2O more capacity. The velocity with a 200 gr bullet would be 2000 to 2100 f/s, plus or minus...pretty close to standard 35 Rem velocity.
I seem to remember something along the same lines back after 'Nam. Not sure if it would be economically feasible, tho'. The 357 AutoMag also falls in this catagory and would be excellent for an SKS or AK action, and even necked up to .375 cal, but again, I think it would cost more than it's worth except in "one off" points. Not to many could brag they had a 35 cal or 375 cal AK 47.
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I would also prefer the standard 0.473" case head over the 0.445" case head, which wouldn't pose any problem as far as conversions are concerned.
Da**...now you've got me cogitating and I already have too many projects going on.
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Happy Holiday
'Njoy