Thread: Need help identiying 327 sbc

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I need a little help to identify which SBC chevy i have. It is not in its original vehicle, its in a 76 Jeep CJ5 that i recently purchased, and dont know any history on it. Was told it was a 1967model 327, but casting numbers come up as a 69, and cannot find anything on engine code. So here is what i know about itn plus the identification numbers and locations.
Casting #, driver side too behind head= 3932386
Plated number on passenger side behind head= K68
Front of block on driver side = HB
possible engine code (behind alternator) = V1I09HU, and this is what threw me, i thought the 4 numbers agter the V was the month/day but mine reads 1I09, I (i) as in international, no plate in this area
Final numbers i found are behind oil filter and looks like this..
N48
371
386

It also has the camel (double hump) heads on it

Any advice, information, anything to narrow it down would help.

The thing that made me start looking deeper into it, was when i was changing my oil pan gasket, and the kit's instructions said that the front pan seal was revised in 1975, to take a seal of 0.410 thickness, instead of 0.220...the kit i bought (for a 67)came with the 0.220, and of course the old seal that i took off was the larger 0.410". This could just be a newer oil pan, im guessing, but threw me for a loop

Thank you in advance

3932386 was used for 302, 327 and 350 blocks, 1969 vintage

You're giving us two different suffix codes, HB and HU.

If it's HB, it's a 350 that came with a TH350 transmission, 300 hp, 4-bbl. I don't now what the A, F and X represent. Couldn't find a legend.
HB...1969...350...tur hydro trans...300hp...4bbl...A F X

If it's HU, it's a 350 that came with a Powerglide transmission, 255 hp, 4-bbl.
HU...1969...350...Powerglide...255hp...4bbl...full size

This motor began life as a 1969 350, but it is possible that it is a 327 now, converted over from a 350. All it would take would be a 327 medium journal size crank to fit the 350 main bearing I.D. and 327 pistons. Same rods would work. I have no idea why someone would do that, but hey, different strokes for different folks.

Take off a valve cover and read the head casting number in between the valve springs. Post it here. I'm betting they're either 186 or 187 heads.

At any rate, these heads and valves were designed to operate on leaded fuel to prevent valve recession down into the head. Redline and others make products that mimic the addition of tetraethyl lead without the downside to the environment......

RED LINE® LEAD SUBSTITUTE is a safe and
effective valve seat protection additive which is
designed for use in engines which require the
protection of lead. Tetraethyl lead was originally
designed as an octane enhancer, but it was soon
discovered that the metallic oxides which result from
combustion form a protective coating on valves which
prevent microwelding of the valve seat to the valve
face under high temperature operation. This welding
of the two hot pieces of metal causes the removal of
the softer seat metal and subsequent recession of the
valve into the cylinder head. Wear debris then
contributes to valve stem and valve guide wear. Valve
recession causes poor sealing of the compression
gases, which means loss of power and fuel economy,
poor idle and driveability, and the eventual need for
cylinder head replacement.
Red Line Lead Substitute provides the same valve
seat protection as obtained with lead concentrations in
the range of 0.5 - 3.0 grams per gallon. This is
achieved by using sodium-based chemistry which
forms sodium oxides upon combustion and provides
the same physical protection from welding and
subsequent metal removal as did lead oxides. When
compared to levels of lead present in the leaded
supreme of prior years, Red Line Lead Substitute
provides equivalent protection for valves and none of
the detrimental side effects which can be found with
other additives.

http://www.jegs.com/i/Red+Line+Oil/8...VlsaAo5F8P8HAQ

.

The SU is at the end of the stamped set of numbers behind alternator. ..the SB is what i see on the front of the block (cast) ..i guess it could be both together..the cast "SB" is by itself , no other numbers

And thank you for your response i will take valve covers off and post #s tomorrow

Numbers on top of head are
8782461
E105
small playe says 13 or 18
GM 7

3782461 302/327/350 61-70 1.94/1.50 Dual quad, FI & 4 brl Corvette 2.01/1.60
double hump 64cc

The plot thickens....E105 is May 10, 1965

Not sure where Ken got his info, but Mortec says:
3782461....64-66...327...Camel hump, no accessory holes, 160/62cc port volumes, 62cc chamber

My best guess is that the block and heads were not mated at the factory and someone has changed them somewhere along the way. Further, I'm seeing the static compression ratio at over 10:1, making a possible detonation problem with iron heads on pump gas.

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From outintheshop.com