I searched quite a bit about this but never came up with the answer, its a pretty simple question, will my 4.2L valve springs fit on my 4.0L head? I've called Jegs trying to order some new ones, called Mopar and their guy didnt know, and searched quit a bit but couldnt find out. Thats all I need to know though, will the valve springs convert. Thanks

I don't know about the valve springs, but the rockers on my 85 spare motor look the same as the 94 head I have. I did hear that if you are going to run an after market cam you will have to get different valve springs. I ran out of funds after the block and head so I haven't gotten that far yet.