im only 15 so i probably aint got much room to talk but i had a 402 in my 66 jus fine with some mounts i made myself and stock manifolds and alls i had had to do was cut a little tiny bit out of the cross member under the bellhousing. takeing the engine and tranny out at the same time was a [censored] tho. i had a 4speed with granny and had to take the top off and make a new gasket
