I just purchased a used engine on Qualityautoparts.com for my 1974 Chevy Nova. I received it today and I'm worried that they sent the wrong one. The mounts on the engine are almost twice as wide as the old ones... The old mounts which I took off the engine have the same hole schedule so they will fit; they are just alot smaller. And the fly wheel or flex plate (I'm a rookie I know) has 6 holes for connecting to the converter instead of 3 and the holes are situated at a much larger radius than the converter's mounts. Am I forgetting a part? I don't have my old engine anymore as the autoschool that was gonna rebuild it, (before learning that the block was beyond repair), well they scrapped it. Can anyone help me.... Did I get the wrong engine? Does anyone recognize the issue here? Again...the new flywheel or flex plate has 6 holes and they are quite a bit farther spaced apart. Thank you in advance. I know I'm a novice here so thankyou for your patience.