No - the 850 cyl head is a different casting number and has smaller valves so will result in power loss if put on a 1098 engine. The 1098 head is a 12G202, btw.
[img]http://i31.photobucket.com/albums/c390/chrisd87/DSC00749.jpg[/img][img]http://i31.photobucket.com/albums/c390/chrisd87/med_gallery_128_45_1416415.jpg[/img]
Sarah - 1970 Minor 1000 2-dr
Maggie - 1969 Minor 1000 4-dr