hih ziggy, have you considered this focus WRC cosworth block which is a replacement for 2.0 zetec http://www.focussport.com/cosworthblock.htm its not bad for the money. and would be much simpler.

would be good with a big blower and a decent head

p.s. this thread has some useful info on putting a cosworth YB into a mk1 mondeo http://forums.turbosport.co.uk/bbs/s...ad.php?t=84745 with keeping it FWD.

if you want rwd or 4x4, unless your handy with a welder your talking major money to put the sierra floorpan in. i think the mondeo 4x4 running gear could be put on fairly easily but would need upgraded prop and diffs for big power.