I understand some people have used the late saloon manifold, and had some alterations to get it to fit. Not sure if they cut and welded the tubes or mikked the faces. That manifold is much better than the GT6 version, if you can get it to fit! Worth experimenting with air intake too, ie getting a cold air feed rather than just bolt on K+N's. Still headscratching on this one! And the 6>3>1 manifold is the one to have, but thats still under (hot) debate as to which one etc. Best bet is to get it set up well on the rollers, get the suspension properly set up with optiflex alignment and have lots of fun! Clive