american 65 impala 327 engine numbers

beaumontguru · Canadian Poncho Superstar!

american 65 impala 327 engine numbers

Beaumont4008 · Uber Guru

F Flint Michigan

04 april

01 1st day of the month

HC 327 250 HP 4 BBL powerglide

Hope this helps.

Beaumont4008 · Uber Guru

Chevy by the numbers shows HC as 250 HP for 65 was also used for 67 and 68 as 275 HP. In 66 its HCR for Rochester or HCH for Holly 275 HP. Shows head # 3782461 camel hump heads for this engine 1.94 valves for 250 and 300 HP for 65 and for 66 275 and 300 HP engine.

67BBSD · Canadian Poncho Superstar!

built on april fools day

LeeRoy · Guru

Any ideas on this one 81 6621765 The 81 is off to the left of the other seven digits. Was told it is a 327,built fall of 1966. Has small journals and "double bump"heads. Could the 81 digits mean a re-bore at some time? confuse

Thanks in advance for any info.

Beaumont4008 · Uber Guru

You got me stumped on those numbers, They could be the last numbers of the vehicles vin number. If you can get the block casting numbers and date code on the back of the block I could tell you more in this case.

Ghost Post · Poncho Master!

Suffix '81' is a Canadian numerical suffix and from a '65 or '66 Canadian A-Body 327 rated at 300Hp for '65 and 275Hp in '66..

Sorry I haven't got the Canadian numerical suffixes laid out here as promised previously but I had them all typed up in a thread here a few months back and when I hit the submit button, poof...friggin' gone and all disappeared into cyberspace?.

I hate it when that happens and was discouraged but I'll try it again when I have a chance..

-- Edited by Ghost Post on Wednesday 26th of August 2009 11:53:19 AM

Beaumont4008 · Uber Guru

Ghost Post wrote:

Suffix '81' is a Canadian numerical suffix and from a '65 or '66 Canadian A-Body 327 rated at 300Hp for '65 and 275Hp in '66..

Sorry I haven't got the Canadian numerical suffixes laid out here as promised previously but I had them all typed up in a thread here a few months back and when I hit the submit button, poof...friggin' gone and all disappeared into cyberspace?.
I hate it when that happens and was discouraged but I'll try it again when I have a chance..

-- Edited by Ghost Post on Wednesday 26th of August 2009 11:53:19 AM

That would be good info for the library if you can post. Have not seen much info on numeric suffix codes.

beaumontguru · Canadian Poncho Superstar!

Thanks Ian! I think you nailed it. sounds like it is a 250 hp 327.
I wonder if the Last "C" would mean "carter carb"?????

it has a replacement newer holly on it now and the wrong intake.
Other than that its a really solid original car and a #s matching motor based on the protecto-plate. BONUS!!!!

4SPEED427 · A Poncho Legend!

Dave

I don't think there is a 250 horse version that uses a Carter. I believe that is reserved for the 300 horse 327's as far as I've ever seen.

That 250 horse is an identical twin to one I picked up in Ron's Auto in Grand Forks years ago before he sold out.

Beaumont4008 · Uber Guru

Correct Carl,. Carter AFB for 300 HP engine Rochester 4GC for 250 HP. Although Corvette had a 250 HP engine that used the Carter WCFB carb. Carter also made the Rochester Carbs but not until 1966.

-- Edited by Beaumont4008 on Monday 31st of August 2009 11:55:50 AM

beaumontguru · Canadian Poncho Superstar!

OK, so lets go back to the original question.

Are you sure it is not a 300 HP engine? It has Camel humps

Again the engine serial # is F 040 1 HCC

I'm not really up on my 65 Numbers.

Thanks for all the help

P.S. the carb is a service replacement for a Q jet made by holley(really weird carb, and the intake and valve covers have been changed, otherwise its original.

4SPEED427 · A Poncho Legend!

beaumontguru wrote:

OK, so lets go back to the original question.

Are you sure it is not a 300 HP engine? It has Camel humps

Dave, are you implying that I, Foghorn Leghorn constantly babble and babble on and on endlessly about everything in the world except the original question, (like I am doing in this sentence........????? smile

If so, yes, I do!!!

Anyway, it is a 250 horse 327, 1965 full size Chev car, powerglide transmission according to my info.

Beaumont4008 · Uber Guru

Here is the strange thing both the 250 HP and 300HP engine have the same pistons, heads, and cam. What gives it 50 more HP the Carb ? Maybe some GM number fudging back in the day.

seems to be a great debate on other forums.

-- Edited by Beaumont4008 on Monday 31st of August 2009 12:14:15 PM

beaumontguru · Canadian Poncho Superstar!

Thanks to all. So it looks like it would be a rochester 4GC for sure?

I was totally confused too, because it has Camels on it.

Just to confirm: 250HP w/ double hump heads and a 4GC?

beaumontguru · Canadian Poncho Superstar!

Beaumont4008 wrote:

Here is the strange thing both the 250 HP and 300HP engine have the same pistons, heads, and cam. What gives it 50 more HP the Carb ? Maybe some GM number fudging back in the day.

seems to be a great debate on other forums.

-- Edited by Beaumont4008 on Monday 31st of August 2009 12:14:15 PM

Ian, i think the difference was the carb and 2 1/2 inch manifolds w/dual exhaust.

4SPEED427 · A Poncho Legend!

Yes

4SPEED427 · A Poncho Legend!

You turkey, you slipped in another post while I was answering!!! Yes to 4GC and double hump. I believe the first (62) 250 horse 327's had 283 heads on them though.

4SPEED427 · A Poncho Legend!

beaumontguru wrote:

Beaumont4008 wrote:

Here is the strange thing both the 250 HP and 300HP engine have the same pistons, heads, and cam. What gives it 50 more HP the Carb ? Maybe some GM number fudging back in the day.

seems to be a great debate on other forums.

-- Edited by Beaumont4008 on Monday 31st of August 2009 12:14:15 PM
Ian, i think the difference was the carb and 2 1/2 inch manifolds w/dual exhaust.

I think earlier but not in 65. Only one manifold size on 65 Impala. I know 63 had the bigger ones on 300 horse.

beaumontguru · Canadian Poncho Superstar!

Carl Stevenson wrote:

You turkey, you slipped in another post while I was answering!!! Yes to 4GC and double hump. I believe the first (62) 250 horse 327's had 283 heads on them though.

Excellent, i think i have that all sorted out now.
Carl, This is what had me confused as well. early 250 hps did indeed have 283 heads.

Lots to learn about 65s now that my cousin has one.