onebad...wouldn't it be easier to upgrade the heads to get the 50hp? I agree w/quick that's it's not likely enough cubes/CR bump to make THAT much (50hp) difference....30 maybe i think.

i just had Ryan work his magic on my 414 E-heads, right at a 30cfm increase over stock from ~.350 to 600 lift and 40+ up way beyond my present cam...that's 50-60 hp that bolts on.

"$1 in the heads is worth $3 in the shortblock"....Joe Sherman