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Old 01-13-2011, 07:42 PM
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casting numbers?

Just wanted to see if anyone could figure out these numbers for me. I spoke with someone over the phone and asked them to give me the head and block castings. They sent me an email with these numbers. Heads-Gm10T_1 18/74. Block was said to be either 8829988 or 8826688 and serial number T1211TSK. The heads numbers seem like dates and I cant find anything with the block numbers. Supposed to be a 454.
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Old 01-13-2011, 07:48 PM
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look here, these links will help
that doesnt look like a head # to me
Mortec Casting Numbers
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Old 01-13-2011, 08:13 PM
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Quote:
Originally Posted by matts37chev
look here, these links will help
that doesnt look like a head # to me
Mortec Casting Numbers
Ive seen numbers like the gm10t, but there not casting numbers and those block castings dont match anything. I may have to see for myself.
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Old 01-13-2011, 08:22 PM
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Quote:
Originally Posted by matts37chev
look here, these links will help
that doesnt look like a head # to me
Mortec Casting Numbers
Ive seen numbers like the gm10t, but there not casting numbers and those block castings dont match anything. I may have to see for myself.
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Old 01-14-2011, 01:26 PM
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Ok, I've got the head numbers which are 336781=336781.....73-85...oval...OPEN...454, 118cc chamber, 256/114cc ports ANY OPINIONS on these heads? As far as the block number the closest I could find would be 3999289= 1972-78 454 215, 235, 240, 270, 2 bolt, car & truck.
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Old 01-14-2011, 01:39 PM
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Quote:
Originally Posted by 396chevelle
Ok, I've got the head numbers which are 336781=336781.....73-85...oval...OPEN...454, 118cc chamber, 256/114cc ports ANY OPINIONS on these heads? As far as the block number the closest I could find would be 3999289= 1972-78 454 215, 235, 240, 270, 2 bolt, car & truck.
those are very good heads, the 781 and 049 castings are what most guys are looking for in an oval port.
they are what i searched for when i was buying mine.
almost one of the best heads for a hot street build.
with some bigger valves and clean up the port work a little, they make great street/strip heads.
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Old 01-14-2011, 01:50 PM
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Quote:
Originally Posted by matts37chev
those are very good heads, the 781 and 049 castings are what most guys are looking for in an oval port.
they are what i searched for when i was buying mine.
almost one of the best heads for a hot street build.
with some bigger valves and clean up the port work a little, they make great street/strip heads.
Good deal! I may go ahead and get this motor this weekend. Thanks for the quick responses Matts37.
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Old 01-14-2011, 01:55 PM
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if you do a search both here and with google (or whatever) on those BBC 781 heads
you will have more reading than you could want
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Old 01-14-2011, 05:18 PM
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Quote:
Originally Posted by matts37chev
if you do a search both here and with google (or whatever) on those BBC 781 heads
you will have more reading than you could want
Thats for sure! Well, I ended up getting the numbers on the block and it ended up being the 3999289, so I guess with this motor I could make a good little street/strip motor out of it . Once again thanks!
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Old 01-14-2011, 05:29 PM
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its almost exactly what im starting with, same heads + bigger valves and a clean up.
then i'm putting a 1/4" stroker scat crank with flattops in the block = tons of very streetable 496 power on pump gas
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Old 01-14-2011, 10:30 PM
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Quote:
Originally Posted by matts37chev
its almost exactly what im starting with, same heads + bigger valves and a clean up.
then i'm putting a 1/4" stroker scat crank with flattops in the block = tons of very streetable 496 power on pump gas
I'm thinking of going with the 496 kit also. I hate to touch it right now though. Supposedly the 454 was rebuilt with the stock bore. He says pop up pistons were used and they installed an eldebrock cam and lifters with a double roller timing set and changed out the carb with a throttle body and that it has no more than 5,000 miles on the motor. He also said it is in a dually right now, so I would be able to hear it run. What do you suppose this set-up is worth?
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