Little confused on doing the 6.1 spring some say just for exhaust and change all push rods some say change them all, the cam I'm getting is a howards 264/268 cam from summit racing

 

What year is your truck? Manufacturer says new valve springs are required. (probably due to more lift than the stock springs are designed for.) A link to the cam in question would be good.

 

this is the cam
https://www.summitracing.com/parts/hrs-786845-14/make/dodge my truck is an 02 but I put an 04 5.7 in it.been reading more about the spring they say to replace all with 6.1 exhaust spring

 

Huh, now on the summit page, the only 'suggested part' is the timing set...... Think I would verify what max lift is on the stock springs.... Might be a good idea to have a chat with Summit, (or Howards) to verify the information.

 

okay will do probably, been doing more research and they all are saying to use 16 6.1 exhaust spring and 8 intake rods and 8 exhaust rods

 

Ive done some research on cams for the 5.7. Lots of info on the lx forum. From what ive read and if i remember correctly the 6.1 exhaust spring has the same assembled height as he 5.7 intake and exhaust springs. The 6.1 intake spring is .1 inch more height. The pushrods are used from the 6.1 because the base circle on the cam is ground from a 6.1 core. The 6.1 cam has a .030 smaller base circle. Some people have there heads milled instead of swapping push rods. Not sure if im allowed to link to the LX forum but there is tons more cam swap info on their site. Are you doing any custom tuning on your set up? Any other mods?

 

already got true dual exhaust x pipe and mid headers as for tune already got my rpm set around 625 when warm and 700 or so when ac on I hated when it was at 500 the truck when stopping sometime shut off but ever since I did the no problem.im not doing the 6.1 cam it's a Howard 264/268 cam on summit racing website

 

Update went ahead an got the cam also got 16 6.1 exhaust springs,6.1 push rods and all new gaskets and head bolts. Ps jegs had this cam $100 cheaper

 

16 exhaust springs?? Gonna use those on the intake as well??

 

yes because 6.1 Intake are taller but the 6.1 exhaust spring are the same size as 5.7 intake and exhaust spring.