Hi again, looking for new head to wake the bird up. Im kind of worried though. i have a 350 that was rebuilt 4 or 5 years ago. Im wanting to put either 13,16,62, or the aluminum heads on it with roller rockers.
Im worried that the top end will be too strong for the bottom end and will throw and rod or something.
If they rebuilt it with stock replacement parts do you think it will hold up? and do u have to have the heads done to fit roller rockers? or will they fit without any work?

thanks again for the help