So I’m currently in the process of reviewing and procuring parts for a complete build (all motor) and have been looking for deals and reviews on parts that seem usable.
I found this KMS site that offers a nice package with block guard for 599. I wanted to see if anyone’s ever used or heard anything about these guys. They say the springs are rated for 11k… that’s pretty good.
i bought their valvetrain package and bronze valve guides. no complaints as of yet, running it with crower 403’s. haven’t put many miles on the engine since i built it though, maybe only 1500 so far. Never did use the block guard though.
As for flat faced valves, I can’t recall its been about a year and a half since i put them in (and probably about a year since I’ve driven the car :bawl:). So for durability over time I’m not the guy to ask, built it, drove it, parked it and tore it back apart lol. I just have more fun working on the car than actually driving it.