Do I have to change the springs when going to 1.6rr?
Thanks

 

yes, it's highly suggested. LT4 springs are about the cheapest way to go

 

Everyone always recommends this but you don't really have to with the stock cam. On mine there was stock a total of 0.030" clearance before coil bind at full lift when using the Crane Gold rollers......yours may be different so check and see.

Just to be clear, the best way is to replace the springs.