Scotty if yer not in any great hurry, I am at long last getting somewhere with this project.
Mike is right the ebay UK ones are in fact produced for the LHD market, but will fit with some help from a hammer
more importantly though are 2 aspects of these, 1) is the quality, trust me they look good but as fabrications of parts that take a certain amount of heat/stress, they are crap
2) and more importantly, having purchased 2 sets so far from ebay for testing, both sets were NOT equal length runners, which kinda defeats the object!
So anyways, I have an N/A guy all lined up to visit a company who specialise in making manifolds for many many companies, these will be made on the car, equal length, ALL stainless construction including flanges and bosses ( unlike ebay ones) and flow tested to prove their worth.
Downside for having these RHD made manifolds in the highest quality AND with a lifetime gaurantee, is the cost, they will be around 400 quid, alot of cash compared to ebay ones, but certainly you WILL get what you pay for, also as far as am aware they will be the only ones available anywhere that are RHD specific and quality
Mike if yer reading this, I still have a set of 350Z RHD headers unused and bought in error if you know anyone who wants em
cheers
smithy