Similar to another Thread on here at the moment ; - I have a Rover 4.6 V8 engine, Fast Road Cam, (but unsure which one :****er, & looks like Mildly Ported Heads, which is powered by a Holley 600 cfm Carb, (Vac 2nd`s), sitting on an Offy 360 Manifold. I bought the Carb "as new" straight from the States, (Bargain!!), and it is in fact fine. But, it was previously fitted to a Chevy 350 ci Motor, and although seemingly OK on the Road, (in fact Acceleration is Brutal !!), on Tickover when Warm, its obviously running too Rich. Can anyone please advise me of what Size Jets to us to suit the 4.6 V8 Lump ??!!.