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Hi guys, I recently acquired a 427 from a elderly customer. Her late husband was building the engine to race. I ran the block numers and it seems to be a 66 corvette 4 bolt main 427. Was planning on keeping to engine but now thinking of selling. Kind of a mystery motor, has the steel high performance heads, aluminum rods, unknown crank and pistons. Cam is in but no gear or chain. Seems to be a high compression motor. Was wondering if anyone could tell me the value of this motor. Block #s 3869942, TOI27IP and 6113138. Thank you.
Does the stamped pad in front of the passenger side head have numbers on it? If so show s a picture of it. If it has paint on it remove it with paint remover or lacquer thinner and don’t scrape or use anything abrasive to remove the paint.
There is a lot of paint on the motor, not able to read any numbers. Where exactly should the numbers be, directly below the head? Will get back to you on that. having trouble trying to upload any pictures to these posts. I will work on thay as well.
Dustin - In addition to the block stamping characters that Darryl asked you about (and yes, they should be visible just below the passenger side head on the block pad), couple other things to look for. On the passenger side of the block, about the middle area, you should also see some raised castings for the date code of the block.
And, is this a 2-bolt block or 4-bolt block? In 66, both 2 and 4-bolt blocks shared the same raised rear casting numbers of #942. If the pan is on and no intention of removing it, look at the block area just above the oil filter pad, post up a pic of the oil passage fittings.
It's one way to externally identify a 2 or 4-bolt block.
Lastly, any overbore markings on the pistons?
Good luck,
Mike T - Prescott AZ
Its definitely a 4 bolt main block. It's not a stock motor, guy was building it to race. Has aluminum rods in it. Found some numbers in the passenger head, HI PERF, GM 3T and E17 71. Not sure if these were the original heads as well. Going to clean the paint with some Thinner and see if I can find the front numbers. This was definetly going to be a High horsepower/ high compression build.
Its definitely a 4 bolt main block. It's not a stock motor, guy was building it to race. Has aluminum rods in it. Found some numbers in the passenger head, HI PERF, GM 3T and E17 71. Not sure if these were the original heads as well. Going to clean the paint with some Thinner and see if I can find the front numbers. This was definetly going to be a High horsepower/ high compression build.
those heads are from may 17 1971 so not really a high-performance head. again the 942 was both a 2 or 4 bolt main block
Northern California. Value is what I'm trying to find out. Not a stock motor, crank is in, aluminum connecting rods with pistons. Pretty much compete heads with roller rockers, cast iron and not sure if original. Cam is in but no gear or chain. No intake. It was definitely being built for high compression, high horsepower. No oil pan, has been sitting in the corner of this ladies garage like this for a while. definitely going to need to be gone through.
Has anyone checked the C2 registry for the V.I.N. on this engine? If the car still exists The owner of SHOULD be the best buyer for it. Of course I COLD nhave a “restoration engine” in it that might make it less desirable to he current owner.
Dont know how many runs the aluminum rods have on them, but that is not typically something that is used nowadays. Sounds like it may have been a vintage application.
02-04-2023, 02:08 PM
66 corvette 427 engine
