I have done this with a honda vtec and a rover T series turbo from a 620, interesting the way you have done it with a modded a series sub frame, all the ones I've seen have used the customary rover metro subby, the T series I did used a MGF rear subframe which is a reinforced version of a rover metro front subby, you just have to replace the lower wishbone and grind off the plate rover weld on to cover the steering rack holes. I had all kinds of troubles with the rovers ignition and security, it had a transponder ignition immobiliser and a stack of relays. Later MGF's have coil spring susp's, could be usefull, the MGF also uses the PG1 gearbox and is a lot better than the rover R65 thats fitted to most of the K series, and you dont even need to have drive shafts made. You also managed to get the rad up front, thats a really good idea, nothing but trouble with rear rads. At least you had the engine with the plastic inlet fanimold, the ports are diffo in the head, they are sposed to be the better of the 2. It'll be worth the effort for the vvc engine, they are a lot quicker, it'll be fun.