Asking for more input. Again.

if it is like most small blocks the numbers you will be lookin for will be on the passenger side along the bottom of the block near the oil pan. it will be in a flat section. numbers will be stamped in. i could be wrong on this though seeing as it is a 67. it might be in a different place. someone else can chime in on this. as far as what engine to build? well i would do the 318 for now seeing it is more cubes and probable alittle easier to get performance parts for. the 273 i would keep as a numbers matching set to the car. rebuild when ever or store it away for future sale.