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Old 07-25-2011, 12:08 AM
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engine identification 327 marine block

Picked this up today, having a hard time identifying the heads. its a 62-65 small journal 327. The motor was the forward moving motor twin that came out of a 66' owens flagship wood boat. Here are the pictures;


http://i938.photobucket.com/albums/a...morgan/1-2.jpg

http://i938.photobucket.com/albums/a...morgan/2-2.jpg

http://i938.photobucket.com/albums/a...morgan/3-1.jpg

http://i938.photobucket.com/albums/a...morgan/4-1.jpg

the block casting is 3782870.

I am finding no info on the hp of the motor and I don't recognize that head identification mark that is on the last picture there. it looks like a 70's head which would make no sense seeing that it is a lower compression head. (76cc)

help would be grand. Btw sold my 283 motors. I decided after looking into it, punching out my old 283 blocks to a 4" bore would be a bad idea and more expensive than starting with a 327 block. the goals for this motor are the same as the 283 block 400-450 crank hp on 91-93 octane, 7200rpm redline 7000rpm shifting, no need for tons of tq just enough for the rpm x tq ratio. I work all day tomorrow so if you guys have more questions on the motor I apologize for not getting back to you right away.

fayt-

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Old 07-25-2011, 12:20 AM
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the block casting is a 62-67, 327 truck or passenger car 250-375hp..the heads look like they are the smaller 283 heads which were used on 327.. they had small valve 1.75 intake 1.50 exhaust something like that with a 58cc chamber possible
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Old 07-25-2011, 01:15 AM
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can those heads be taken to the 2.02 size valve? how well do they flow?are they worth machining?
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Old 07-25-2011, 01:36 AM
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if infact they are the 283 heads which im not real sure, just look like they are.. No they can not be fitted with 2.02/1.60 valves.. I tried that many years ago with a set of 283 heads.. but for sure, need the casting numbers from the heads to be sure
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Old 07-25-2011, 01:38 AM
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the valve covers need to be removed to find the casting numbers correct?

if those are the 283 heads what would you guess the hp is at now with the assumed cam to go with those heads valve/lift etc. i will find out tues or wednesday on the casting on the head which i will then post, i will be too busy to check until then.

holley carb btw
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Old 07-25-2011, 01:40 AM
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Quote:
Originally Posted by blight
can those heads be taken to the 2.02 size valve? how well do they flow?are they worth machining?
not really, you can buy a set of aftermarket heads complete for the price you would pay to have those machined.. Im sure the ports are really small on those as well
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Old 07-25-2011, 01:43 AM
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Quote:
Originally Posted by blight
the valve covers need to be removed to find the casting numbers correct?

if those are the 283 heads what would you guess the hp is at now with the assumed cam to go with those heads valve/lift etc. i will find out tues or wednesday on the casting on the head which i will then post, i will be too busy to check until then.

holley carb btw
yes you will need to remove the valve covers.. the id number will be a like a 6 or 7 digit number.. the last three are the most important numbers we need to see what they are.. as far as HP the way it is.. maybe 200-250HP or so just guessing not really sure
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Old 07-25-2011, 08:37 PM
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bringing the motor up to my home garage tomorrow night will have an update on the heads late tomorrow evening.
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Old 07-26-2011, 09:35 PM
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they are 3998993 heads so they are the common big chamber head blech, what do you guys think of the RHS aftermarket heads via jegs? im looking for about 460 or so crank horsepower.
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Old 07-27-2011, 01:17 AM
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RHS heads 170cc intake runners would be fine, a guy did a dyo sim with a 327 .030 over using the RHS heads and made about 450 hp at 6000rpm and 450lbs of torque at 4500rpm with a mid upper range cam using these heads sbc heads post #6
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Old 07-27-2011, 05:13 AM
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well there is a 235 cc intake, 220, 200, etc would it not behoove me to go bigger to start wih? the 235cc isn't that spendy in comparison.
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Old 07-27-2011, 12:28 PM
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235cc IMO is way to big for a 327.. you will loose low end torque 190cc would be the max I would go as far as intake runner size with a 64cc chamber.. these are just my suggestions, but you do what you would like to do.. If you had a 400sbc and were to do some racing with it, then the 235cc would be the ticket.. this is the head i was refering to http://www.competitionproducts.com/R...info/RHS12407/
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Old 07-27-2011, 03:58 PM
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will that work with this cam? also i dont really want much more than 400 ft lbs.

http://www.lunatipower.com/Product.aspx?id=1966&gid=284
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Old 07-27-2011, 04:27 PM
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Marine motor

its a 327 block after looking up the numbers but I can not find the head numbers you posted. But you have a 327 only block not a 283 62-67.
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Old 07-27-2011, 04:40 PM
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Quote:
Originally Posted by blight
will that work with this cam? also i dont really want much more than 400 ft lbs.

http://www.lunatipower.com/Product.aspx?id=1966&gid=284
That cam will work just fine with the RHS heads I was referring to
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