1967 PONTIAC 400 cu.in. ENGINE-What is the right number head for that year engine,also can I put a 1975 crank in a 67 engine block without machine work. THANKS FRANK

YOU OPEN THAT HOOD AND ASK THE BLIND?
NO ENGINE TOLD AT ALL, AND IS A PURE ENGINE QUESTION.
I GUESS YOU MEANT HORSE POWER?> OR TORQUE AT THE FLYWHEEL>?
OLD TRUCK MAY HAVE HAD 3 ENGINE SWAP NOW.
THE VIN CODE SHOWS DAY 1 ENGINE CODE THERE
BUT PERSONALLY ID GET THE ENGINE SERIAL NUMBER FIRST OFF THE ENGINE AND GOOGLE IT.
BINGO WHAT ENGINES IS THERE.
K30 PICKUP? HAD 4 ENGINES DAY1 NEW USA CHOICES
GEN3 K30
ALL GEN3 HAD SOME OF THESE OR WAS SWAPPED OUT.
BACK THEN I'D DE-TUNED MANY ENGINES TO GET 16MPG NOT 8 OR WORSE.
WITH CARB CHANGES, DID MANY
Powertrain
Engine 250 cu in (4.1 L) I6
292 cu in (4.8 L) I6
262 cu in (4.3 L) V6
305 cu in (5.0 L) V8
350 cu in (5.7 L) V8 GUESS 2
366 cu in (6.0 L) V8
400 cu in (6.6 L) V8 GUESS 1
454 cu in (7.4 L) V8
350 cu in (5.7 L) Oldsmobile Diesel V8
379 cu in (6.2 L) Detroit Diesel V8


YOU NEED HEAD AND BLOCK CASTING NUMBER TO KNOW WHAT IS REALLY THERE IF THE 8TH VIN CODE IS WRONG UNDER HOOD
400>? SAYS USED EXTENSIVELY ON TRUCK THEN,.

Early models produced 265 hp (198 kW) with a two-barrel carburetor. All 400s came with a two-barrel carburetor until 1973. A four-barrel carburetor option became available in 1974.

The 400 was never intended as a high-performance engine and never saw large factory horsepower numbers; nevertheless, it developed a reputation for creating tremendous torque (up to 400 lb?ft (542 N?m) in 1970)

OLD CARS OR TRUCKS MAY HAVE HAVE MODS
STEEL HEADERS
BETTER CARBS (FOR MORE HP OR FOR MORE MPG)
HEAD SWAPS.

They are 2.2,2.4,3.4 3.8 and 5.7.

Depends on the size of the engine. They manufactured several engines for the large vehicles. The V8 350, V8 400 and the V8 428. These had many possible horsepower outputs depending on the cubic inch size, intake, exhaust and weather they were a "Super Duty" or High Output" engine. It could have had a 2-barrel or 4-barrel carburetor, or even a special order Tri-Power in 1967. The Tri-Power is 3 2-barrel carburetors.
The horsepower ratings ran from 265hp to 390hp. I would say if your 1967 Bonneville has the original engine it may well have been a first year V8-428 running either 375hp or 390hp. Check on the (*facing the engine) "Head" , front face, behind the A/C, you should see 2-letters stamped, such as: WG, YH, WJ, or YK.
These letters designate which block-type the V8-428 is. Which will tell what horsepower it was rated at. If it happens to be a V8-428 with the very rare special-order only Tri-Power intake it is said they were rated at 425 horsepower!

If you can locate a "Motor Auto Repair Manual" from the 1960's (1961 through 1967) it will list the engine identifications, block marking, as an example a V-8 428 "YH" engine was rated at 370hp with an automatic transmission. The manual will list a multitude of information about the full mechanical workings of those Pontiacs. I have several, they are great. These manuals list many automobile makes and models made during those years.
Good luck, and I hope this helps!

Could be a 194,230 or a 250 six cylinder engine.

Where did you find that number?

45 ft/lbs in 3 steps: 20, 30, 45. Use some kind of moly lube - or at least engine oil - on the threads and under the bolt head.

Aftermarket studs/nuts like ARP will be slightly higher. Package will give instructions.

Well, according to Pontiac Power online, a 65 or 66 Pontiac engine with XB is a 389 with a 2 barrel carb, but it was used in the B body which was the Catalina and Bonneville.
A 67 engine with XB is a 400 with a 2 barrel carb.
0489308 does not show up on the list.
Casting codes from 19064 to 1968 started with 97xxxx.

Yes, you can just do one head gasket, although I wouldn't recommend it.
If the head gasket has failed, it's usually because the engine has overheated. If you know that the engine has overheated, it would be best to do both heads.
When an engine overheats, the head warps a little. It doesn't take much to change the internal pressures on the gasket, and when the gasket area between the cylinders starts to lighten up a little, the gasket fails.
To do the job properly, take the head(s) to a qualified automotive machine shop and have the head resurfaced. Even a slightly warped head will be unable to keep a head gasket.
After a head has been resurfaced, it's relatively easy to put it back together.
NOTE!!
The machine shop will tell you the proper torque and torque sequence. Usually start from the center and work your way out evenly, going from side to side, and top to bottom, but get specific information for YOUR engine from the machine shop.
NEVER replace a head gasket without having the head resurfaced.

What kind of Pontiac engine you have? Is it pre-80's? Pontiac engines have a 2 letter stamp on the front top passenger corner of the engine block. The year is usually next to the distributer hole, and the actual casting number is located on the top rear of block. Some sites offer casting number searches. A good one is wallaceracing.com. They deal with everything from block and cylinder head numbers. If the engine is 1970 or newer, engine size is casted behind the dipstick passenger side of block and also on the front driverside of block too. There are many different variations of codes to list. A example it the engine is made in 1967, casting number is 9786133, code on the right front of block says YE, then it's a 1967 400, that originally had a automatic transmission connected to it, had 10.5 to 1 compression, #066 camshaft, 143 or 061 cylinder heads, 4bbl carb, and 325 horsepower.

that cast number leads to the 472 Cadillac V8 Engine.