Ok guys I'm wondering I rebulit I motor a year ago and I bought 1.6 rockers then but never installed them I just put the 1.5 back on my question is can I run my 1.6 on stock tbi heads 305 with lt1 cam I can remember the exact lift but I got new springs new valves and just looking for a little more power before I buy the ebl flash I have headers etc only thing really stock is heads crank and intake

 

You'll have to verify piston-to-valve clearance, retainer-to-guide (or seal) clearance, valve spring coil-bind clearance, pushrod-to-head clearance, and you'll have to see if the rockers you're installing are guided the same way as the rockers you have. (i.e., are the current rockers self-guiding at the valve stem tip, or are they pushrod-guided; and do the new rockers use the same method.)