? about valve springs for GT40 heads

[Old Guy with 87 GT]

the locks i had to get were part #99096-1

according to the tech guy at crane ,the different locks are rarely needed ,.... but there are variences in tolarances on every moter and on mine i needed the locks to use the springs with my roller rockers

it might be a good idea to get some washer shims to have on hand before installation (there pretty cheap ) but i'd wait to get different locks intill you see if you need em (there like 30$ for the set )

crane sent me the lock kit for free since the origanal kit i got was suposed to work with my crane rockers ,and stock heads .......i got goofy tolerances on my heads , so the kit didn't work .......(.the guy at crane was pretty cool ,went out of his way to get me the locks quickly ) anyway ....i don't think there needed vary often

well hope i helped .....good luck