Thanks for the feedback guys. They do list the dart block as an approved replacement. Why they didn't go with the SHP platform instead of the Little M I'm not sure; but it seems overkill for a 400 HP engine. I suppose if you're building a super stock engine that's a good thing. It's also about 70 LBS heaver than a stock block. I've been down the salvage yard block path only to be the proud owner of two cracked blocks. I thought maybe this block might be a little better than what came in the production vehicles. I guess the only way to find out is to buy one and try.
