Boyce Remanufactured 2 1/2 ton 6 x 6

[Gunfreak25]

Did you figure out what kind of motor they used?

 

[targhee trucks]

Did you figure out what kind of motor they used?

Hendersond noticed the ramshorn exhaust manifolds and identified it as an early small block Chevy. That's all I have so far. I don't know enough about those small blocks to do more than just make a guess. My first guess would be 350, maybe 327.

 

[targhee trucks]

Name that engine!

How about it small block fans. Can anyone identify the engine in Boyce 1? Look at the pictures, watch the video and tell us what you think.

I'll check answers next week when I get back to working on the trucks. opcorn:

 

[hippiedude]

283 .......

 

[73m819]

still think it is early 289, has the rounded valve covers

 

[targhee trucks]

still think it is early 289, has the rounded valve covers

I know that Ford had a 289, one of my favorite old engines. Did GM have one too?

 

[Ridgerunner]

289...No 283, maybe.

 

[73m819]

yep, getting old 265 or 283 chevy sorry

 

[hendersond]

Here are your choices:
265 (55-57)
283 (57-67)
302 )67-69)
307 (68-70)
327 (62-69) early had small journals and no PVC valve in VC
350 (67-70)
If I remember right, the pcv palve was in the valve cover after 68 and in the valley of the block at the end of the intake before 68.
Can't tell exactly from the pic. How about some pics of the front of the heads? How many frost plugs in the side, 2 or 3? On the RF of the block is a number stamped on a machined pad just below the head. That will be the answer.

 

[targhee trucks]

yep, getting old 265 or 283 chevy sorry

Understand! My wife just said to me the other day, "Do you know you asked me that question 5 minutes ago?". (I didn't know). Scary!

Thanks for your reply!

Jack

 

[hendersond]

On closer examination I see
1974 and later HEI ignition,
pre 72 but post 68 vavle covers,
late 60s to early 70s fuel pump.
Truck aircleaner,
Looks like early 70's large rams horn exhaust.
early short waterpump.

I guess I have no Idea what you have.

Casting numbers....

 

[targhee trucks]

On the RF of the block is a number stamped on a machined pad just below the head. That will be the answer.

Are you saying that the number stamped in will be the engine size? 283, 327, 350, etc? Will I see one of those numbers, or a code that leads us to the engine size?

Jack

 

[hendersond]

But wait! If it has 3 frost plugs per side you have a 1970 to early 19772 265hp 400ci

If it does not, then casting numbers...

 

[hendersond]

a code that will send us down a path.

 

[targhee trucks]

On closer examination I see
1974 and later HEI ignition,
pre 72 but post 68 vavle covers,
late 60s to early 70s fuel pump.
Truck aircleaner,
Looks like early 70's large rams horn exhaust.
early short waterpump.

I guess I have no Idea what you have.

Casting numbers....

Ha! Sounds like they used whatever was left on the shelf! Oh well, it ran good!

There's no date on the Boyce VIN tag riveted to the firewall, so I don't know when the conversion was done. But a '74 ignition makes it look like it was after that, unless that was added later.

I will get to see title, reg., etc., next week. That may tell us something.

Did GM have a "decade" letter code for their casting numbers like Ford did? C=60's, D=70's, etc?

 

[73m819]

On closer examination I see
1974 and later HEI ignition,
pre 72 but post 68 vavle covers,
late 60s to early 70s fuel pump.
Truck aircleaner,
Looks like early 70's large rams horn exhaust.
early short waterpump.

I guess I have no Idea what you have.

Casting numbers....

all the above will pretty much fit on all the short blocks, could be repair replacement parts or up grades done by the owner

 

[hndrsonj]

Did GM have a "decade" letter code for their casting numbers like Ford did? C=60's, D=70's, etc?

On the left rear top of the block (kind of between the rear of the head and distributer) there's a # cast under a big "GM". On the right front of the milled head surface on the block (forward of the head) there's a stamped number. Post those two and i'll tell you the size, year and what it came out of. I can also narrow down what vehicles a particular item (head, water pump etc.) came from and what year they are if you have the numbers off the items. (yes, I am like a junior CARNAC on small block Chevy's).

 

[targhee trucks]

(yes, I am like a junior CARNAC on small block Chevy's).

I will seek what you request next week, reply to you then and await your wisdom, Magnificent One.

 

[hendersond]

(yes, I am like a junior CARNAC on small block Chevy's).

That is funnier than heck!

 

[targhee trucks]

On the left rear top of the block (kind of between the rear of the head and distributer) there's a # cast under a big "GM". On the right front of the milled head surface on the block (forward of the head) there's a stamped number. Post those two and i'll tell you the size, year and what it came out of. I can also narrow down what vehicles a particular item (head, water pump etc.) came from and what year they are if you have the numbers off the items. (yes, I am like a junior CARNAC on small block Chevy's).

I had a few minutes to stop by the trucks this afternoon. I have a casting number for you, but it didn't come from either of the places you mentioned. Both those places were too covered by a thick layer of goo and I didn't have time to scrap it off. I'm planning to work on the trucks tomorrow and will have more time to get the engine cleaned off.

The casting number I got is off the left rear runner of the intake manifold.

378438
GM 20

If that helps, great, otherwise, I'll have the other numbers tomorrow night.

Thanks,

Jack