Hello, new here just looking advice. I just picked up a 84 351 HO motor out of a f150. I have a set of gt40 cast heads I intend on doing a mild port on. A victor Jr alum. Intake and holly carb. I want to install roller rockers and a roller cam. I'm not too sure what to go with I was told a 1.7 rocker with a mild cam. I guess my question is what is a good ratio for rocker arms and mild cam size could I run with and have valve clearance and will a factory length push rod work. Any tips or advice would be appreciated. I've also had mixed reviews on using gt40 heads on this motor as well? Any personal exp.?