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yep mine is staying parked until I get it back to a shop to try and figure it out. I really think a 7.425 pushrod will help. I’ve got a set of basically brand new TSP 7.425 pushrods I’ll sell you if you want em. Bought them new and used them for a couple hundred miles
Shoot I might take you up on that, your in VA right? I'll get a measurement here next week and get with you on that if its what I end up needing.
I gotta be realistic, I dont think I want to tear the motor down to the point of taking the lifters back out to measure that, if I'm going that far I'll just do heads and a better lifter while im at it lol. I dont disagree, and if I had the motor out on a stand I absolutely would. But I'm hoping I can just add some length and hopefully shut up the clattering. I dont even know that clattering is the right word, more of a flutter that sounds like an exhaust leak. Just more want to check it for piece of mind. Next year when I build a shortblock I may look into that a bit more but I think at that point I'll be looking at other lifter options.
Going to be truthful, and no way I would do a cam swap, without pulling the heads to change out the lifter trays to new ones if the cam does have more lift. Hence plastic lifter trays are the only thing keeping the tappets from rotating, and if the trays are worn, the lifters to do rotate, going to take out the lifter rollers and the cam lobs as well.
I did lifters and new trays when we did the swap, that's why im not pressed to take it all apart at the moment just to measure the preload situation. Lifters are GM Caddys. Pretty sure it honestly just needs a bit more length.