I purchased a Tuff Dawg engine (383 cu in 450 hp) and placed it in a firebird. From the start it seemed to be lacking the advertised horse power but there was not much to be done about it. I never took it past 5300 RPMs and never really jumped on it, waiting for the break in to complete. At 563 miles the engine gave out, knocking several holes in the oil pan. After the engine was out I removed the intake manifold and found that the cam was in pieces, at least one rod gone and chunks of metal throughout.\r
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I contacted Darl and was directed to ship the engine to him. I set the intake in place, bolted it finger tight for shipping and created it up. When next I heard from Darl he said that it blew up because the intake was loose. I explained to him in five separate emails that the intake had been set on finger tight for return and that the engine ran 11 in/hg of vacuum. I eventually had to hire a lawyer to contact him. Under threat of a law suit he finally honored the warranty and replaced the engine.\r
This new engine did somewhat better. It did have a slight vibration but I attributed that to the torque convertor. At almost 3000 miles this engine did the same thing. This time I disassembled the engine since I could not trust even a free engine from this company. The cam was in pieces, two broken rods, push rods and lifters wasted and the block worthless. I did find out what caused the vibration. He had ground the damaged spots off the old crankshaft and used it on the new engine. In fact most of the parts were from the first destroyed engine, including the rod bearings. \r
Keep this story in mind if you plan on purchasing an engine from D & J Machine & Engine Parts.\r
Cons: MANY
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