Ok ive got a block with the D4AE-AA casting i plan on building a pretty decent 351 is this block ok to start with or should i keep my search for the 94-97 roller 351? (went to a junkyard and saw like 10 econoline vans fitting the bill but all of them had the motor pulled Then went to a yard where they pull it and they told me 800 dollars for a one but all i want is the short block so i passed)