Originally Posted by 65Guera
I received $400.00 in gift certificates from our local speed shop.
And was thinking on a new cam the XR280R or the XR274R....
I dont know if this would be a good upgrade or not......Any advice would
be greatly appreciated...
I have a 357 SBC .30 over
Lunati roller cam and lifters 248 duration @ .050...555 lift
Roller rockers 1.6
Dart 215 pro1 aluminum heads
MSD ready to run dist and 6AL ignition box
373 rear gears
I think it would be a waste of money to change. You already have an outrageously large set of heads and cam for your cubes/compression and more cam might really hurt the mid range due to duration and dynamic compression loss.