Identifying cylinder numbers?

Is there anyone who knows what these cylinder are: J 14-5 16561-54 & H29-5 16581-54, Kh maybe?
Thanks Stefan.

Stefan, I don't have my books in front of me, but the numbers sound right, you lucky dog! G

Well, I aint lucky yet. Might not be either, just wanted to be sure it was the right thing before I go any further...

YES U WON. THEY R 55 INN. KH CYL. HOWS BORE?

Thanks xlr, whats INN? Have'nt gotten any info on the bore yet btw...

cubic inches. ks were 45 kh 55 what is bore dia. if to big for pistons u can get there is trick using indian pistons

Yeah, now I got it... Thought you ment they were made -55 & tried to figure out what INN was KH, cool that's what I needed to know! Thanks!