to buy used valvetrain components like RR, HD LT4 timing set

 

No its not really bad. Things like roller rockers and timing gears arent that bad to buy used. Heck, even my lt4 valve springs are used, i havent had any problems with them. I however wouldnt advise buying springs and pushrods, simply bc its hard to tell sometimes if they are bad or not. Hope, this helps.

 

Roller rockers are ok if they're in good shape. But aren't timing chains wear components that are supposed to be replaced new??

 

I wouldn't buy a used timing chain, that's got bad idea written all over it.
Use a new one, it's well with the investment to know you do not have slack.

Same with pushrods and springs, it's just not worth it to save a few bucks.

Rockers should be ok if they have not been abused.

 

Uh huh.

 

I bought a used LT4 timing set from a moderator on here. I would say if it is a good reputable source and the mileage is decent, then it wouldn't be a bad aquistion.