302 performance build
FTE Legend
Joined: Jun 2006
Posts: 31,930
Likes: 1,499
From: Ottawa, Ontario
I haven't looked at those links yet but I'll bet they used an aftermarket block for those builds, the stock 5.0 block is only reliable to the 450hp naturally aspirated level give or take, super high rpms, boost, and nitros that push power beyond that level will produce mains walking and block flex and sooner or later it's gonna let go in spectacular fashion.
Lead Driver
Joined: Sep 2003
Posts: 7,018
Likes: 210
From: SoCal
I don't know how much power those engines put out, but they were both using stock blocks. I do remember that Sixto was advised to keep it under 6000 rpm. Chucko uses his for road racing, which he's done several times with the engine (that I knew of). I haven't spoken to either of them in a long time, so I don't know what the condition of the engines are after some use.
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