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Any info on the original cast number of a 327 hp F series 1967 chris craft seastate

chefrc

New member
Hello Every one
as you can see from the info below: i have 2 motors 327 hp F series and one does not have holes in the head to attach the raw water pump
So i need to change the head so i cn attach the raw water pump
Port side engine
The casting number on both heads are 3884520
These do not have holes for attaching raw water
That casting number gives me the following info:
1960 to 1967 327 ci 60cc chamber and 1.72/1.54 inch valve
Block number is 3782870 Small Block V8 1962-1967 327, 2 bolt
intake is 3844459
3844459
1964
1965
327
327
300
300
Cast iron with Carter AFB. Riveted oil splash shield.


Starboard side engine:
Casting number for the heads is: 39322454 for both
Thses have whole for the raw water pump
It says its for a 307 or a 350 1968-69 valves 1.72/1.50 inch cahmber 76 ccc
Block number is 37782870
Intake is 3844459
3844459
1964
1965
327
327
300
300
Cast iron with Carter AFB. Riveted oil splash shield.

My question is i wonder if chris craft original casting number on head 39322454 but it says it comes of a 307 hp
or did it come with 3884520 and i just have to find a head with that number that has holes to attache the raw water pump
 
it says in chevy small block manual V8 interchange manual by david lewis printed in 1989 that that design on side of head help identify casting number without opening valve cover but in his book it says casting 388 but i have the same hole pattern and design but is a 393 and my 388 has no hole and not same pattern very confusiing so looking for clarification on what head i really need with holes in it to bolt on raw water pump
 
I think that you may be confusing displacement with horse power.
"hp" is synonymous with Horse Power. The 327 most likely refers to displacement.

Unless your early SBCs are High Performance Automotive engines, they will not be producing 327 horse power.

Also, the 5.7L SBC was not introduced until 1968. The 5.7L produced approx 250 to 260 hp in the Marine versions.


If you are at all concerned about the 60cc chambers, go to one of the on-line static compression ratio calculators and plug in your numbers.

Compression Ratio Calculator (Static and Dynamic) (omnicalculator.com)

RSR Static Compression Ratio Calculator (rbracing-rsr.com)

Compression Calculator (summitracing.com)

Compression Ratio Calculator - Wallace Racing

Compression Ratio Calculator (uempistons.com)

The 327 cu in SBC bore is 3.670" and the stroke is 3.100"
Your pistons are most likely F/Ts.

The one 327 (with the 76cc chamber heads) would need to have a domed piston in order to make the correct S C/R.

If these are indeed 327s, one of them is not built correctly for true Marine use.


Also, if you would rather not change the cylinder heads on the one engine, you can switch each engine over to the much better designed Johnson F5B-9 crankshaft seawater pumps.

shopping



Do us a favor and post some photos.


.
 
I'd say your best bet is to contact one of the houses that specialize in 'restoring' Chris Craft engines...they should be able to tell you which casting number(s) were original...if that's what you want. Or you can use what you can find, with the correct volume, assuming the short block is in good shape (ie passes a leak down test w/o any issue).
 
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