I have an 1800 zetec and have a stage 3 head with big valves. I wanted to fit jenvey or webber throttle bodies but the thought of spending £2000 on these has left me looking for other options, I have heard of a rover 820 inlet manifold being used and wondered what work was involved and what sort of gains i would expect, I know i wouldnt get as much from the 820 as i would the other two but is it worth looking into.?

just dont know what to do!
helllp