[TOM NELSON]

Mast looks like they really have a nice set up going and have some neat packages but you should beware that the problem does not lie in a short rod ratio it is.It is in how far the piston comes out of the bottom of the sleeve ls motors are all including the lsx gm and warhawk world with the exception of the ls7 short sleeved motors around 5.5 inchs in length.When you put a 4.100 crank in that and have a compression height of 1.065 roughly you end up with problems because the pin for one where the compression height is measured will be higher than the oil ring so virtually all the skirt comes out of the bore within a few hundred thousands of an inch from the oil ring.The piston will go past gauge point and rock quite a bit when it goes to make the change to going up the bore and this will wear the skirts out super fast and wear the rings funny most likely start using oil in the near future because of this we learned this the hard way especially when making power you will shear the skirt right off the piston not fun especially when the crank is spinning inside the engine.Chevy figured this out with the ls7 and added over .300 to the bottom of the sleeves the fix this but the l92 ive seen are much to short.I would be concerned about this a ton of people are building these right now.But it is not the answer when you want reliabilty.When we build a 427 or larger We either resleeve it correctly or build it with the taller deck height blocks.or we won't sell it to the customer Many people will tell you its fine it is not.This is something everyone considering a stroker ls should consider because its exspensive to fix.