difference between truck ka and 240 ka?

[240_de_Ville]

i was just wondering if the ka that came in the trucks had a different stroke or compression ratio...and if they did have a different stroke would the crank from them fit in the sohc? for a lil more displacement. for example if i were to buy a rebuild kit for my 89 sohc and the truck rebuild kit had a better compression due the the pistons or a better stroke due to the crank shaft would the parts be interchangeable? or are the same exact engine? thanks in advance