FTW! I trashed my ls1 block! A valve broke and dropped into cylinder 2. So I need to know what block to use with my Patriot Stg 2 59cc 2.055/1.57 and trex cam. Should I use an iron 402 Ls1, a ls2 aluminum 402, an ls1 383 or an ls1 iron 408? Which would be the best with my current H/C. What about the interchangeable parts with the Ls2? Thanks for the feedback and opinions!

 

Same thing happened here...

Went with the LS2 402

 

Are the single springs breaking? Why are these valves falling?

 

says here valve broke. I would hope he wouldn't be running a TRex with single springs anyway.

 

ptv clearance issue. Ran great for a couple hundred miles.

 

So which engine should I go with??

 

402 if you can afford it, 408 if you want to spend a little less money. If I could do it again I would have definetly go with a 402, or maybe even a 414 (L92 block) if you have the money.