Cascade Crew

wanarunhard · Posted: Thu Nov 16, 2006 7:01 pm Post subject: chevy heads big valves 140.00

k stock chevy heads big valve 194 intake maybe 202 not sure ready to run 140.00 will deliver maybe depends where i go to portland a lot so hit me up casting no is as follows 93417369 and then it says gm11 also 320 under the valve cover

rjmcgee · The Hammer Joined: 08 Jan 2004 Posts: 2328

Whats the casting number?

wanarunhard · Posted: Fri Nov 17, 2006 8:06 pm Post subject: heads

k can any one tell me what theses casting numbers mean?

chevymad · Posted: Fri Nov 17, 2006 8:58 pm Post subject:

I think you'll find thats a 33417369. Thats a Hecho en Mexico replacement head that came on a low performance crate motor. It has 76cc combustion chambers so it will keep compression pretty low too.

You can look up casting numbers on www.mortec.com

rjmcgee · The Hammer Joined: 08 Jan 2004 Posts: 2328

wanarunhard · Posted: Sun Nov 19, 2006 5:48 pm Post subject: heads

ok so i got the motor that these heads came on so its a good possibility that it a crate motor right?

Twilightoptics · Posted: Sun Nov 19, 2006 5:56 pm Post subject:

Define "crate" motor.

Cause you can have a "crate" motor, that is in no way shape or form a "performance" motor.

chevymad · Posted: Sun Nov 19, 2006 7:25 pm Post subject:

If the blocks a match it should say hecho en mexico on the back near the bellhousing. Those heads and the mexican block come from the low performance crate engine. They're usually rated 210hp gross and have 4 bolt mains. The 290 hp and up motors are the performance motors. Those blocks will be canadian or US.

wanarunhard · Posted: Mon Nov 20, 2006 12:22 pm Post subject: heads and block

ok i didnt see made in mexico anywhere on the block but low performance crate motor right? would be reliable workhorse though

chevymad · Posted: Mon Nov 20, 2006 9:12 pm Post subject:

Ya. those motors are great pullers. Put it in a pickup and it'll run a very long time. Low compression so they'll burn crap gas too. Or swap cams and heads and it can be made into a performer.

Twilightoptics · Posted: Mon Nov 20, 2006 9:48 pm Post subject:

I thought there were some machining tolerances or that it was kind of a crappy casting or something that made the mexi blocks crappy?

chevymad · Posted: Mon Nov 20, 2006 10:21 pm Post subject:

It's their castings. They're great the first time through. But they really need to be checked for core shift if you're going to bore. There's alot of extra iron in them so they're heavy. I think they do this just to make sure that if the castings off there's still enough metal. The one I have they actually had to grind on the sides of the valley to make room for the lifters to drop in their holes. The american blocks don't even come close to being in the way. I've heard that if you find one without alot of shift, becuase of the extra iron they're a tough motor. Just looking at the differences between my hecho en mexico block and my others, i've always rebuilt the american blocks. Someday if i'm desperate, I might do my mexican one.

wanarunhard · Posted: Mon Nov 20, 2006 11:57 pm Post subject: heads and block

ok nobody thinks these are worth a mexican taco right? so enough history lesson and just delete this thread please ill just throw in whole motor with the camaro i have up for sale maybe some one wants to do a v8 swap on it