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markedman240 Mar 9th, 05, 1:19 PM this is on a 350 block heads and block both stamped h-21-0 head casting #'s3973487(did not see an x)75cc LT1??i can not find the code2DI anywhere could this be a 71 275HP LT1 motor poss out of a camaro? it is in my 70 malibu any help appreciated thanks mark also what could c-10-7 mean?the VO825 looks like an original stamp http://pg.photos.yahoo.com/ph/markedman240/album?.dir=/137e 70Z15 Mar 9th, 05, 3:43 PM I tried your link, but got 'Album not found' markedman240 Mar 9th, 05, 4:54 PM fixed link please try again i dont know how to repost 70Z15 Mar 9th, 05, 5:01 PM OK, working now. Those do look strange. Not your normal Chevrolet stamping from the early 70's era. Sorry I can't help more. Can you see casting number on back of the block? markedman240 Mar 9th, 05, 5:57 PM block # 3970010 302,327,350 Gary S Mar 10th, 05, 12:38 AM The 3973487 head was used along with the 3973487X head on just about every 350 made in 1971 and 1972. It was made in both 1.94 and 2.02" valve versions, with the 1.94 one obviously being the more common one.You should be able to tell which one this simply by pulling a valve cover. The 1.94 versions have the pressed in rocker studs and no guide plates. The 2.02 versions were from Z28 and Corvette engines with a solid lifter cam so they have the screw in studs and guide plates. Nothing I have shows a 2DI engine code so I can't help there. elcamino Mar 10th, 05, 10:04 AM Looking at the stamp its obvious to me that something went wrong when the guy hit the stamp. Likely lot of cursing becuase he probaly hurt himself. The 2DI seems to have been stamped apart from the rest of it. I can find no suffix with a ?DI in it. AS for that other number, it makes no sense also. Can't explain this at all. A suffix that has the lead characher as a number is a Marine Engine suffix but 2DI does not exist in my references. It possible it could be an irrigation/industrial engine application but I have no info on many of those. The stamper.. http://www.synthetic-oil.com/images/EngStamper.jpg 70Z15 Mar 10th, 05, 5:23 PM It should have a VIN# if it was originally installed in a car/truck. markedman240 Mar 10th, 05, 7:55 PM interesting.the c-10-7 is where the vin would be ands its upsidown compared to the other stamp.its probably a basic 350 although with a 2bbl 2.73 gears and tall 15"tires it has no problem leaving 20ft of rubber! thanks i thought the pics would be interesting anyway.heads do not have guideplates so valves are probably 1.94s i was hoping it was an lt1,guess not. great site much great info thanks again mark | ||