Can a 95 4.3 block be bored to fit lt1 pistons and are the heads from a 4.3 and lt1 the same?

it should that would make an lt1 302 like the old z28 camaros

ABOVE ANSWER IS WRONG

The block is the same. The displacement of the 4.3 (L99)is different because it is de-stroked. The pistons and rotating assembly will bolt in the same as a 350 block. LT1s have little to do with the 305, aside from the external dimenstions the heads are also essentially the same but may requirew portwork to equal the lt1