Havent heard of kragen, but I just did business with a company called PowerPro2000. My rebuilt long block is getting put in right now. Check out this deal. 5 year 100,000 mile warranty on the long block. They pay for all shipping, to and from the shop. Also pay $500 for your core exchange. Total cost for me is coming out to $3150. Totally Radical if you ask me. If you wanna see what im talking about, check out [ www.powerpro2000.com ]