Food for thought..

[old school truck dude]

Just thought Id touch on a subject that many folks never consider:

   These older motors, we buy them from a guy that got them from another guy who got it at the junkyard or whatever. I used to work in machine shops doin heads and blocks years ago. They run these things through by the thousands. Some heads get milled, some dont, some blocks get bored, sleeved, decked, whatever.. Some guy comes along and ANGLE MILLS a pair of heads slightly or alot. One head cracks, the other gets back in the mix somehow. Dude comes along and has another head same casting #.. Hmmm, thatll work he says. Goes on a motor and it runs ok at first, but goes to runnin goofy later on, cant figure out why. Dude puts a motor together with what seems to be a regular old block, only its been decked and now compression is a little higher than stock, but he puts the good heads on there and cant figure out why it pings all the time.
   The moral of this story is you need to know what all has been done to motor before you sink a buncha parts in it and its already paper thin from machining. Alotta these so-called crate motors are exactly that, paper thin. Can you spell INTERNAL VACUUM LEAK?? Do you know how to track one down? How ya gonna do that when youve already put a modified cam in that motor so it wont be pullin full vacuum anyways?? Must be the carb, must be the dizzy, oh boy lotsa money and the problem changes but never really goes away.. Nuff said, right? Just some food for thought.

[ToughBowtieTruck]

Did you get that truck done yet?

[jbeery78]

Yea my 400 in my ford is a "mystery motor" lol. I know it has a cam, no idea on the make od the profile, no clue about the valvetrain, bottom end, etc. It has oil pressure and it runs so i suppose itll do for now. But i definitely agree i hear a lot of guys talkin about goofy issues, and theyre never too sure about what is really goin on in there motors.
i know im not sure about my 400 lol... and im not ashamed of that.

[old school truck dude]

Did you get that truck done yet?

Runs and drives, far from done its one that Im keepin, just gonna keep doin more and more