looking to put chevy power in my 65 buick skylark. found a 400sb complete from pan to carb. bone stock except for the edelbrock intake and holley 750. has 69k miles and came from a blazer. not sure about year or if it is a 2 or 4 bolt. comes with a fresh built 350t tranny with extra clutch packs and shift kit. he wants 1500$ for the combo. should know year and main tomorrow. any advise is app.