Hi Me again........ I went to Iowa yesterday and picked up my '63 Chevy Biscayne. Also have the 327 Chevy home, and ready to start the rebuild. I am getting a bit confused on what I really have... Hence the help request. Here are the numbers. Engine Block 3892657 Engine Build info: V0804HC Double Hump head numbers (Under valve covers) 3890462 Now if I am reading the internet tables that I have found correctly: The block was manufactured in 1965 The engine was put together in Flint MI on Aug 4, 1965 The heads date to 1967 So here is my question. Am I reading something wrong? Why would it have 1967 heads on a 1965 engine build and 1965 cast date for the block. Also the heads do NOT have the stud holes for accessories, which if I understand correctly were missing on 1962-1966 heads only?? Here are a few pics of the Biscayne, plus a pic of the numbers on the double hump heads. Thanks in advance for any help. Bob
are you sure that the heads came with the engine when it was built? I mean maybe the owner swaped out heads at some time.
Just my opinion, but after 40+ years, don't ***ume you are the first one to tinker with this vehicle. Head rebuilds, head swaps, engine swaps, have been going on since the first hot rod.
what's the casting date code on the block? but yeah, heads get swapped....back in the old days it was common to need a valve job after a few years, and it was common to just get some rebuilt heads from a machine shop and give them your cores
hELL ,I"ve got a 327 smallblock ,according to the block no same block used in 1968 and 1969 CAMARO BUT ENGINE WAS PULLED OUT OF OLD FARMERS 1970 EL CAMINO,HE bought the car new and never had any work done Back in the day my DAD worked in the CINCINATTI,G.M. PLANT ,he told me that just because a engine ,transmission,or rear end wasn"t used that production year,they didn"t just throw them out,they used them in other applications.
Block casting is 3892657 I wasn't expecting a virgin engine, just was confused by the 1967 date on the heads, when I understood that the last heads manufactured without acc. tapped holes were in 1966, meaning 1967 would have had holes. Bob
I was asking about the block casting date code, is it from 1965 or 1966 like the heads? I thought they made untapped heads thru 1968, but only because they didn't use the holes until 69 when they went to long water pumps.
I have the 283 out of my 67 Chevelle the heads do not have any accessory holes. I know for a fact these are the original heads that came on this motor back in 67.
I thought the #462 head castings did have the tapped holes for the alt. mounting backet... I could have sworn those heads had those. I could be wrong?????
If you wanted a 327 and got a 327 and desirable 327 heads who gives a rippy doodaa what exact year they are? You aren't building a National Chevrolet concours 100 point restoration. It sounds like you have a pretty solid base for a stout little 327 in that more door cruiser that will surprise a few folks. And yes as several guys mentioned it is very common for guys to haul their heads to the machine shop and swap them for fresh heads. In a past life I worked in a shop that specializes in exchange cylinder heads and that was a daily occurrence as it saved a couple of days turn around time on a valve job.
462 heads do not have the threaded holes in the front. That started in 69. You may be thinking of "492" heads ? Here's a great reference source. I have it saved for times like this. http://www.fastnuf.com/Headguide.html
The 492 heads are 66-67 327 small block heads ... the casting number indicates that they were cast July 29, 1966 ... that they arent original to engine should come as no surprise. I changed heads more then once especially to get performance heads on a base engine. <TABLE bgColor=#ffffff border=5><TBODY><TR><TD>3890462</TD><TD>62-68</TD><TD>1.94/1.50 & 2.02/1.6</TD><TD>250-350</TD><TD>64 CC Chambers No bolt holes These are also double humps</TD></TR></TBODY></TABLE>
Whoops, it is at that. And a slick one at that. My bad on that one. And yes this old fart really does need new gl***es Or a bigger screen on the laptop.
There was a time until the mid 80s that every 327 that hit the junkyard had the heads removed and sold to some hot rodder or drag racer. It's more of a surprise to see an absolutely unmolested 327 than one re***embled from previously salvaged parts. Lots of strange things happen at dealerships too. A dealer would have replaced both heads if they were damaged.
The '69 build date is the start of REGULAR production heads WITH the front mounting holes. That is the year of the extended water pump which allowed the alternator and Airconditioning compressor to be mounted in a more forward positon than previously. I to worked at a machine shop all during this era and can confirm that many oddball swaps were done at valve job time so it's a **** shoot as to what a car might be equipped with. Frank
Peaked my interest.... The 327 I built for my 32 chevy project has a casting number 3914660 = 1968 327. The engine code is t1025hf which doesn't match to a 327 in 1968 (hf) I really don't give a &&it but now I am a bit confused........
Thanks Lippy I wasn't going to lose sleep over it but..... Inquiring mines need to know. Thanks again I appreciate it. --------------------------------------------------------------------------------- measure twice, cut once...... Screw it up anyway!!!!!!!!!!!!
As stated, 1969 was the first year for heads with accessory bolt holes. 1968 and earlier engines DID NOT have heads with bolt holes and they used short water pumps. Some great mind at GM decided that the alternator should be mounted on the p***enger side and the AC compressor should be on the driver's side. Really makes sense to run twice as much hose to the compressor and clutter the engine. I've never heard a good reason for this change in '69. Tim
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