Early Cat to Zetec question

[sparecr]

Okay I have finally went out to really look at the problem with my Caterham (1977 with Lotus Twin Cam). Well with cylinders 1&2 at 55psi and 3&4 at 25 I guess I should have looked sooner. Since I really am not in the mood to rebuild this twin cam. I may have a buyer for the twin cam and have been considering selling my car in order to buyer a newer Caterham with a Zetec, how crazy am I or is it even possible to swap a Zetec into a solid axle, short cockpit, narrow Caterham? Has anyone done it? I have never really paid much attention to Zetec info that is tossed around but maybe now I should have. Of course if anyone is interested I may take offers (low teens) on my car as it sits.