What future mods do you want to do to your car?If there's a blower in the future then wait untill you can get blower cams and the blower all at the same time.If you want to port and polish the heads you probably should wait untill this is done also.In other words,unless you want to keep buying different cams,wait untill everything else is done and buy a set of cams that compliment the mods you have done.If you have done everything you are going to do,call the cam company and ask them what they suggest.They can tell you about any piston clearance problems.