Thanks for the reply. Sounds like I'll be better off spending money on the 408 that these heads are meant for.
Nik is who I was thinking of after reading his post as well. Car ran well for the combo IIRC. But that's not to say it wouldn't have run better with more appropriate heads.Potentially poorer performance and loss of current fuel mileage. Port velocity will be slowed because of the larger port.
The end result will be a sluggish, torqueless bottom end.
Now,.....If you add a cam, intake, and exhaust to the mix......Then they'll work.
There are a couple of examples on this forum where somebody else has done it and yielded really good power out of the combo.
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