I have an ED on straight gas research. Just wondering if there are any kits that specifically suit this type of set up and how much it would cost?

what kind of mixer and converter do you have? what kind of power are you chasing? not sure of any kits but price up manifold/j pipe, exhaust, turbo, fittings etc etc and whatever price you come up with double it then you'll be close to a realistic figure. my cars nearly finished i'll make a list of prices and parts and try get some fotos on here and give you a bit of an idea how much etc.

any turbo 'kit' should do the job, has no effect on the Gas system.
main thing is ensuring you have balance lines running from the pressurised side of the turbo to the top fitting o the LPG converter.