i deal with mostly chevy small blocks so im not really familiar with the olds details. i ran across an engine that im going to be putting into a car. i got the engine from a friend of mine who said it was a 260 olds. but the intake is wider like the 350 olds is and its got the gold valve covers. im going to be putting it into a 87 cutlas that i will be possesing as colateral from someone that was a former friend. well if anyone can share any details on reading the block that would be well appreciated. thanks