z1 engine

well, can anybody tell me which head is better? i have the 76 kz900 engine and the 73? z1 engine. also, if anybody has a 1000 engine, is that anybetter for performance than the 900 engine? how about the head, can you tell me a good combo to look for? ie: 1000 engine with 900 head; 900 engine with 1000 head; 73 vs. 76 head. i know with my car i had to find a 67 gtx head and i was wondering if kawasaki changed the head from year to year like that. thanks, ryan this is a before picture, this is how the bike is now, i paid $400 for it, a guy had it in storage for many years. but it needs some work.

apparently my pic is too big, oh well.

i posted the pic in the gallery, its in the kz900 section and its the black one on the sidewalk with the bushes behind it.

build yourself what you can handle,its gonna be pretty easy to overpower a stock 900 chassis so worry about getting the chassis work sorted out before you go buildng a mountain motor it doesnt matter how fast it is if you cant stop and steer it.I went from a 125 hodaka to a basket case 900 when i was 13(27 years ago)so ive been doing this awhile when i got that first bike running i thouht i was god,my dad told me if that bike didnt scare the hell out of me everytime i cracked the throttle i better park it !ive had 1170s,1200s,even had a1428turbo that ran an 8.05 at topeka with no slick or bar(I knowfaaaaaaaast)take it from me let this bike evolve over a period of time and keep it drivable you will have a lot more fun and it will teach you a lot.goodluck ,have fun and be safe.if need anyhelp with questions let me know wireguy1@aol.com