It's a riddle

[sarge]

Mike , I will start listing the parts that I sold him with the rig :

I got the intake and TBI off of a suburban with a 350 in it , it had a Holley TBI unit on it ( I guess Jacob found it was bad ) . I can't remember the year , but I would say it was early 90's .

Jacob ,
just to make sure , get the numbers off of the block , I never second guessed the guy I bought the K-5 off of as to it truely being a 350 , it may be a 305 and this would cause problems .......

[Mike F]

sarge, Did you pull the entire TBI system off the suburban?

I have the casting numbers for chevy V8s up to 86. At some point after that GM started to cast the displacement litre size (like 5.7) into the same spot as the casting numbers on the rear top of the block in front of the trans.

Hybrid, We also need to ID the replacement TBI you picked up to replace the bad holley TBI.

I can trace some of the numbers for some of the original GM parts. I can only read the info off the chip for the 7747 ecm to see what it is but it realy doesn't matter for that one because I can change it if need be.

[sarge]

the intake and TBI were already off the burb sitting inthe rear seat , I pulled the ECM out from under the dash and I can't remember is I found the dist. or not . The guy I got the K-5 from worked at GM and told me that he blew the 305 and put a crate 350 in it a few months before I got it . It looked like the standard Mexican 350 with the perimeter bolt valve covers that you can get for like $1400.00 .

The burb ( if I remember correctly ) was not the old square style ( 80's ) but more like a 90's . I have a 90 and it was still the square style so I don't know when they changed. I think the ecm is the 7747 , I think I checked when I was going to order a harness.

[Hybrid]

The number on the ECM is 1228747. Where on the block is the number for the motor? That motor might very well be a 305, b/c i bought a new 350 harmonic balancer for it and I can not get it to TDC for the life of me. The coil i replaced in the distributor was a little plastic thing with copper wire coiled around it. It sat underneath the rotor button and it was connected to the sensor in the distributor.

[Mike F]

I do not have any info on the 1228747 ecm but do for a 1228746, if it is a 8747 I can not hook into it and the only option would be to convert to a 7747 ecm if I was to mess with it.

The block numbers should be on the top rear edge of the motor.

That coil was probably the pickup and the sensor is the ignition module.

[sarge]

Jacob , don't freak if it is a 305 , I have all the 305 stuff off my Camaro.

[Hybrid]

The number on the block is 14010207

[Mike F]

The number on the block is 14010207

That comes up as a 80-85 350 casting in the book I have. Looks like the guy may have not been to truthfull. Look at the top of the block (cylinder deck) right in front of the left head as you are looking at it, GM would stamp part of the vin code for the vehicle the motor was originaly installed in unless it was a crate motor, but I have the casting numbers for those up to 88.

I can run the casting numbers off the heads also. They are under the valve cover though on top of the head.

What wire harness do you have?

[Hybrid]

The place you are describing sounds like where I got the number for the block. The only other number I could find was on the intake manifold which is 14057055, i don't know if that helps or not.

I used a brand new wiring harness from a place called Affordable wiring, or somthing like that, it was awhile ago.

[Mike F]

The casting number was behind the right head and was in the mold when the block was cast. The other number in front of the left head is on the cylinder deck (ledge) right in front of the head and is a small number that was stamped on the block when the motor was put in the vehicle. It may or may not have one if they stoped doing it. It is where the saying "matching numbers" comes from with the old muscle cars and how you would know the motor was original to the car.

[Hybrid]

It doesn't look like any numbers are stamped on the ledge. Does this mean it is a crate 350?

[Mike F]

Maybe, maybe not if they quit stamping them. The target master blocks have different casting numbers. The casting number says it is a 1980 to 1985 regular production 350 block but my book only goes up to 88 and they may have brought that number block back for crate motors maybe, but why if they already have a block in production? Also 86 and later blocks have the displacement cast in the block.

The older target master blocks also had Hecho en Mexico above the casting number.

The head number may shed some light, the target master blocks supposedly use a 3998993 head at least untill 88 but so did some production motors.

I have found sights before on the net with curent casting number info I may get a chance to look for one.

[Hybrid]

I will check the numbers on the head, and post up as soon as i get them.

[Hybrid]

The numbers on the head are 462624 and there was another number below that one which was D290. Sorry it took so long, it was a busy weekend!

[Mike F]

That is a 77 to some time past 1988 350 cylinder head that has 1.94 or 2.02 intake valves and 1.50 or 1.60 exhaust valves depending if the head was for a intermediate or high performance motor.

The book also said that head is a light casting and will not take getting hot!

Looks like the motor is a stock 350 truck motor.