Got to say, the K-series that's powered the Lotus 340R I've driven a few times has been bomb-proof. It had the extra Lotus approved package that took it to around 190bhp and has been given death everywhere its been.
It makes a rotary engine sound smooth on idle - it really is that lumpy. But once opened up, its raw, loud and screamy - exactly the type of engine you want in a car like that.
I would be stunned if that 340R isn't running a modified head gasket and steel dowls ? as i know a fair few 340r owners from when they were new and non of the VHPD engines (the 190) in any car it was put in didn't have issues
and the 190 idiles way nicer than the sport 160 lump .