Originally posted by Crick:
i dunno about cliff cherry but these engines were used in the grand nationals (bottom end) and could stand at least 700hp tested, dunno about the tranny but i think they can stand an increase in hp only if used wisely not every accelaration! Our GTP can easily do 12's with these mods. 10psi plus tires means speed. pm me if you have other questions
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The 3.8 GN and the 3800 Series II/III are similar in only two ways:
1) They are both 231ci
2) The connecting rod bolts are the same.
That's it. They are not compatible with each other in any way, shape, or form and nothing will interchange.
Good luck with the new GP Overbosted. I hope you enjoy the car and have fun moding it. If you want good and useful info you sould stop over at clubgp.com and sign up. There are lots of helpful people over there that know what they are talking about and will help you out with any questions you may have. Be sure to read the links that Cliff posted they are very helpfull. Also check out this one
LINK Good luck with the new car and that Vet looks very nice.