rolls ran his XR2 Turbo with a 1.8 ZVH on a standard CVH chip for quite a while without it blowing up so it should get the car running. might need a dodgy MOT to get it past emissions mind.
dont go driving it silly just get it up to MSD and get the chip re-mapped.
IIRC those EEC-IV chips are pretty expensive so its agood job they can be edited, not the 10p eeproms that go into cossie ECUs.
i once broke a brand new MSD EEC-IV chip by not following the instructions and plugging it in upside down, felt proper guilty when stu did me another for free as i found out the cost of the hardware was almost 100quid