you know what mr.p said makes alot of since to me ...about the verta to big....i had a 340 with a small solid cam and ported heads and i changed everything i could think of to make the car 60' even the verta but i went to a smaller verta(8") from a 9.5 5000 the 8" was a 5600 car didnt lose any but didnt gain a thing....now that i think about it if i would have put maybe a 4000/4500 or even a 3800 car may have been alot better then it was...something to think on...sorry for the hi jack just had to share my ex. mike