i have a 78 454 non emissons lrg oval port 761 heads from 2x4 suburban that was 10k trailer tow package from factory. it has bad cam but ran great till passing gear rpm then poped threw carb some. pulled intake and found flat exaust lobs. i am going to install in project truck. and am using tbi system on it with 670 holley unit. want to know what cam and lifter , spring combo to use with this project. truck stats are in my profile section. thanks for the help.