Nothwithstanding the factory rating I think most will dyno well less than 300 hp in fact based on the heads flow limitations. I am not sure anything is gained by the 2 fours but they look good. If you have some head work done you can get one to yield over 300 hp. Ted N. who is a member had a lot of work done on one by AMP and here are his dyno results:
http://www.v8buick.com/showthread.ph...light=dyno+401
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