[Toby]

It's all a shot in the dark. I just tore apart a 100% bone stock 5.0 engine no intake, exhaust etc and it has broken ring lands on 5 pistons!! Cylinders 2, and 5-8 all are broken.

To answer the question about boss vs gt, the cranks are exactly the same save for the balance job. The pistons are a mahle brand forging and the rods are an, IMO, weaker then stock gt, very thin rod. Also there seems to be assumptions that the boss rods and pistons are lighter, when in fact they are heavier then the gt stuff. I will tank pics and give weights tomorrow when I get back to the shop but IMO I would say the gt stuff may be stronger.

<620 rwhp you should be fine unless the ringlands fail. More then that you are just on borrowed time IMO. Another major weaklink is the block for you crazy hp guys. The sleeves are extremely thin, I would not recommend more then 850 rwhp on a stock block. More then that an you are just on borrowed time.

At this point I have built about 15 of these coyote engines with 4 in the shop now waiting to get done. I have pretty much seen every different failure and each time it's either number 8 failure a ringland fails or just too much damn power for a stock short block at 700+.

Take it for what it's worth, this is just my own hands on experience with these engines.

Now to answer the op, personally I am a little bias to procharger. I have installed every brand except vortech and hands down the procharger is the easiest and simplest kit to install. It requires very little to no modification to the vehicle with everything being reversible and not having to cut every piece of plastic under the good like some of the other brands. The kb kits are also very nice but come at a price.

I personally am considering a procharger for my ls swapped c10. Hehe