I have read on this website allpar.com that in 1989 they switched all the 2.5 liter blocks to a common block. these are suppositly all the same after 1989. i also says that the common block (89 and newer) was the strongest block. does anybody know if this is true? i have a t1 that i am looking at making some real power out of and i was wondering if it would be a good idea to switch to a block newer then 89.. any descussion or input would be a big help thanks.