Originally Posted By: Twisted6 I.I #3220
Like Bruce said pull the plugs and take a look. And yes you can
tell the difference through the spark plug hole,between a dished
piston and a flat top. dish=s 250 flat top=s 230. IF everything is stock. If the is a 250 and has been rebuilt IT could then have
flat top pistons.Many have done this to get more compreesion.


So from that statement its all based off the pistons. I know from what others have said its been rebuilt or done over with that above mentioned tag. If it was me and I could sqeeze a few more ponies out it I would of swapped out the pistons too.

Thanks I'll try and pull a plug and see if I can look down into the hole.