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Old 02-07-2006, 03:46 PM
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sbc engine suffix code

i'v got block with a suffix code TXE and not able to find out what it is. wondering if anyone can help. The other num are K0407, 3970010, and T51523659

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Old 02-07-2006, 04:11 PM
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couldnt find TXE, but mortec.com states the 3970010 to either be a 69 302 Camaro Z28, 69 327 truck, or a 69-80 350

for the suffix code, TXE wasnt found, but all surrounding codes indicate truck platforms.
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Old 02-08-2006, 12:59 AM
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it can be a 327,302 or 350.it a desireable block in that it has extra tin and nickel in the casting to make the cylinder wall harder for racing purpose's.behind the timing chain cover,on the back of the block and down by the oil filter location you'll find an 010 aover an 020 marking which stands for an extra 1 percent tin to help the molten metal flow into the casting mold.the 020 stands for 2 percent extra nickel.most of these blocks were 4 bolt mains but not all.a good many were used in trucks.your code is some how wrong.in the 60's there was a 2 letter code and in the 70's it changed to a 3 letter code the first letter always being C which stands for chevy.you have a (t) where the (c) should be.the only thing that differs in these three blocks is the crankshaft size.that code is not in my books and it should be if it were right.anyway those 3 numbers 327,302 and 350 are all the same block.the crank is what chnge's it.its a good one,enjoy it after having it checked out at a reputable machine shop.it may be an indusrial number like for a state or city truck or car.

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Old 02-08-2006, 01:11 AM
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3970010 blocks,
If its a four bolt main, its a 350. If its not, its either a 302, 327, or a 350.
If the crank journals are the smaller ones, it is a 302 or 327.
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Old 02-08-2006, 05:14 AM
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With a suffix code of TXE there is no way it can be a 302, they were all either DZ or MO. I am at a loss also to identify the TXE suffix .

Vince
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Old 02-09-2006, 08:48 PM
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well i went and look again and had to scrape a little deeper the correct code is TXB. there was some paint and the b made it look like an E
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Old 02-09-2006, 10:05 PM
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1975 TXB 350 conv.cab LS9 165hp 4bolt- C-20 to 3500
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