Pulley envy = blown engine
Check around here you'll find several cases where guys would be so eager to pulley down and end up blowing their s**t up and then want to switch platforms.
Just because one guy can get away running a 3.4 for example doesn't mean another guy can with the same mods. Elevation plays a huge part. As well as how the motor runs. Only thing that can be done is to scan scan scan for knock and make sure timing, a/f is set where you want and then decide of you want to go further.
