I want to rebuild a "motor' that I have that I have always thought was a 305 with a 4Bbl. after I got it pulled out I was looking at the casting number on the back of the block and it was 3970010, which to me has always been a 350, heads are just a old set of 882's , A friend of mine comes over and took the numbers off the front passanger side bank that are stamped into it and they are K01Z1TK 07 114635 When he looked in his books it says it is a 305 cu. in. 1978 chev car/truck motor, I have never heard of a 3970010 blook with 882 heads being a 305 but he said that some of those blocks are 305's and some are 350's, all depends how they finish machine them. Does anybody know what this mystery motor is without me having to tear it all down and mic. everything?
The suffix TK come's up as a 1978 305 from a firebird with 145 hp.. Info from this site, http://www.nastyz28.com/gm-chevy-codes/chevy-engine-codes-suffix-8.php Is it possible there is another letter after the K? HOWEVER, the casting number is what was used for 302, 327 (large journal) and 350's from 69 to 80. I've personally never seen an 010 block as a 305, but that dosn't mean anything. I'd double check the suffix just to be sure..
305 has a much smaller bore than 350. I would think it is a different casting, or the cylinder walls would be tremendously thick on the 305. Crankshaft stroke is the same though.
My first car was a 69 Chevelle that was supposed to have a 63 Corvette 327/365hp motor in it. The code stamped into the pad just forward of the head supported that story, but the internals and casting numbers confirmed that it was a 69 Chevy 350 passenger car engine! The shop that worked on that car before I bought it is still in business (barely) all these years later, and I'm sure he still has his handy number & letter stamping set, too! I'd say you got a 350 there...the casting numbers rarely lie!
I guess the best think to do is pull it apart and do some measuring, I am sure there was mistakes made at the factory on the stamping numbers, maybe that is what happened here
the casting numbers don't mean squat,i have had 2 307 chevy motors with the 010 casting number on the block. we raced them in a stock car that had a cubic inch rule,311 cubic inch. we got protested almost every week by someone that saw that casting number. in those days it cost them$125 to pull a head,easy money in my book.
common knowledge...all 350's are lt1's...and all 327's are vette motors... or aleast that was what i have been told ....usually by the seller of said such motors..... brandon and for the record , last 305 i looked at , was marked either 305 or 5.0 on the side of the block ....been awhile ...can't remember which...
Ha Ha...yeah, just like every 289 Ford is a "Hi-Po", and every 302 Ford is a Boss...even the ones with two barrels on them!!!
Compression test it. Your 882 casting numbers probably point to a 76cc head. If you got a 76cc head on a 305, you've got about 7:1 compression.
I looked up the numbers,the stamped numbers say it's a 305 from a firebird 78 with 145 hp 2 barrel carb.Maybe you missed a letter at the end most of the other TK suffixes are mostly all 350's and 400's.Pulling it apart is the easiest and best way.Pull one head and measure the bore.
The casting number is more likely correct. 3970010 comes up as a '69-79 350 or a '69 302. Most of these were 4 bolt mains, but some were 2 bolt. heads with casting 333882 were used on 73-80 350's and 400's. I would think that the valves might hit the block should they be used on a 305?? they started casting the engine size into the blocks in '86. As said, Pull a head, then you'll know...
882 casting heads are 76cc castings. a 3970010 block is a 4" bore block. You have a 350 there. A 305 of that vintage would have 450 casting heads and a 460776, 777, or 778 block. I just scrapped one that was in a 79 Camaro. I have never seen a 3970010 casting block that was anything else that a 4" bore medium journal block. They cannot be 307's because the unfinished castings bore is about 3.9" - larger than the stock 307 bore. With 882 heads its 99% that its a 70's 350. A 76cc chamber on a 305 gives about 6:1 compression ratio. There are 3970020 blocks which are 307 blocks. K01Z1TK is not a good engine code. K = St Catherines engine plant 01= January Z = should be a number signifying the day 1 = is in question because it can be the second digit of the day TK = is in questions because the 1 above might be a letter. You need to go over the engine code again. Sand the pad down and see if you can get the numbers to come up better. The engine code you have there definately has something wrong with it.
No No.............I Got One Better..........Every Pontiac Seller has RAM AIR IV Heads, Check out EBAY..............Liar Liar...............Cannot give the shit away. A set of camel humps is like carrying cash, a set of Pontiac 400 Heads is like carrying concrete.
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