Information from a 1985 road test and a price list of a 1700 Supersprint engine kit from 1990 would indicate that the 1700 is a 1600cc 711 block with a 90/1000th of a inch over bore to provide 1691cc with pistons to suit and the following other changes:
high lift, short duration cam - 234
head has fully flowed ports
heavy duty oversized valves
duplex valve springs
twin 40DCOEs Weber with 32mm chokes
Caterham quoted 135bhp at 6,000rpm
Looking on the web - Ford appear only used up to 1600cc kent engines in Escorts. An the Mark 1 GT had a 1300 engine.
Edited by - MusCat on 20 Jan 2010 23:38:13