Ive got a 1.8 sapphire cvh engine in my indy, so I bought a throtle cable for 1.8 sapphire cvh..... but its not long enough?? Any ideas which cable will fit?

Go to a decent bicycle shop and buy a teflon lined gear wire assembly and a couple of solderless nipples (any good car shop - I don't include Halfords in that). If you need a really long wire ask for a Tandem rear gear wire. Should cost about £5 top whack. If you get stuck I can braze nipples onto wires and make an assembly for you.