A few years back, one of the pop mags did a body roundup that listed permissible flash voltage. All the Z bodies at the time were 300V. This is before the -L, -ist bodies came to market.
Tim Sherburne wrote:
Steve... Funny you should ask this. I have a 285 (non-HV) that measures 8.36v at the foot. I've used this with my ZX-M and MZ-S without ill effects, but I couldn't find any reliable information on what either of these bodies can handle without getting fried.

