I used a Crower cam in my 440/6 ( I think its 32242 )and I use stock rockers and a lil better spring. It has 222@.050 and 234 @.050 duration and .486/.495 lift . A great cam with a ton of power and good with stock manifolds due to its wider 112 lsa. Another great cam I used on a friends sixpack car is the Mr Sixpack cam. BTW ,do you really have 10.5 compression ??? I think you would have to deck the block and mill a bit off the heads and use a steel shim (oem)head gasket to get it that high. My sixpack block had the oem pistons about .020 down .