May be its the same as the magnetic pulse distributor available in the early years.
No, I had that one in my 66 big block GP. From the outside there was no hint that it didn't have points other than the wiring harness. It used the point style distributor cap.
I think it was available in 66 only for Canadian Pontiac but I'm still learning...
Ya , I found a unitized ign. pic above, looks very similar to a HEI. The link explains more about it.
1974 was a transitional year. HEI was offered as an option, then in 1975 all GM cars came standard with HEI. So the answer is 1974 but GTO, you got to be kidding. The last real GTO was 1971. Cheers. George.
__________________
1957 Pontiac Pathfinder Deluxe sedan restored 261 six
1974 Chevrolet Caprice Estate wagon low mileage original 400 V-8
You think the 72 was that much different than the 71? Wow, I thought they were pretty similar.
And as much as we want to deny it, there's plenty of talk about the 73 being the best handling GTO ever made.
And the Nova guys may disagree with you about the 74 not being a fun car. I know what you are saying, it didn't fit the mold of earlier GTO's but all the same, it was a nice package.
Anyhow, back to HEI's...
-- Edited by Carl Stevenson on Tuesday 15th of March 2011 07:41:41 AM
__________________
1966 Strato Chief 2 door, 427 4 speed, 45,000 original miles
1966 Grande Parisienne, 396 1 of 23 factory air cars (now converted to a "factory" 4 speed)
You think the 72 was that much different than the 71? Wow, I thought they were pretty similar.
And as much as we want to deny it, there's plenty of talk about the 73 being the best handling GTO ever made.
And the Nova guys may disagree with you about the 74 not being a fun car. I know what you are saying, it didn't fit the mold of earlier GTO's but all the same, it was a nice package.
Anyhow, back to HEI's...
-- Edited by Carl Stevenson on Tuesday 15th of March 2011 07:41:41 AM
I know a whole bunch of guys that will tell you there was no "real" GTO after 1966 B
'64 Parisienne CS "barn find" - last on the road in '86 ... Owner Protection Plan booklet, original paint, original near-mint aqua interior, original aqua GM floor mats, original 283, factory posi, and original rust.
And then there the GTO's Big Brother..The Grande Parisienne and staying with the thread....NO HEI
Ahem ... you mean '64 Parisienne Custom Sport
__________________
Prince Edward Island
'64 Parisienne CS "barn find" - last on the road in '86 ... Owner Protection Plan booklet, original paint, original near-mint aqua interior, original aqua GM floor mats, original 283, factory posi, and original rust.
According to the high performance article referenced above in the thread, "Anyone familiar with the operational characteristics of an HEI distributor will find the Unitized functions in a nearly identical fashion". So whether you call it HEI or Unitized Ignition, I submit that it actually started in 1971 as an option on some models and in 1972 as an option on the GTO! Not 1974 as others have suggested.
-- Edited by 71judge on Wednesday 16th of March 2011 09:53:39 PM
long stroke wrote:I am baseing my statement on HORSE POWER. As of 1972 all motors were smog motors. Power ratings droped big time. Cheers. George.
The last real GTO was 1971. Cheers. George.
You think the 72 was that much different than the 71? Wow, I thought they were pretty similar.
And as much as we want to deny it, there's plenty of talk about the 73 being the best handling GTO ever made.
And the Nova guys may disagree with you about the 74 not being a fun car. I know what you are saying, it didn't fit the mold of earlier GTO's but all the same, it was a nice package.
Anyhow, back to HEI's...
-- Edited by Carl Stevenson on Tuesday 15th of March 2011 07:41:41 AM
__________________
1957 Pontiac Pathfinder Deluxe sedan restored 261 six
1974 Chevrolet Caprice Estate wagon low mileage original 400 V-8
George, are you aware of this? I copied this from a GTO site-----
Compression ratios were lowered on all 1971 GTO engines and were also rated by the SAE Net method as well as the previously used Gross method. The standard 400 c.i. V-8 with a 8.2:1 compression ratio was rated at 300hp gross and 255hp net. Two other engines were optional, both displacing 455 cubic inches. The first 455 was rated at 325hp gross and 260hp net and it could be had only with the Turbo Hydramatic automatic. The top engine option was the 455 HO (High Output) rated at 335hp gross, 310hp net which came with a three-speed automatic transmission. The cylinder heads featured round exhaust ports and the intake manifold was cast in aluminum. 455 HO decals were used beneath the GTO decals on the front fenders. Also a large 455 HO decal was used on the air cleaner lid. All engines came with valve covers painted to match the engine color and the air cleaner was painted black.
The base power for the GTO package was a 400 engine with 250 horsepower at 4,400 rpm. This engine had a torque of 323 foot-pounds at 3,200 rpm. A 455 engine with the same power was an option. Another far rarer option was the 455-cubic-inch HO engine, similar to the engine used by the mighty Trans Am. The engine delivered 300 hp at 4,000 rpm, and a torque of 455 foot-pounds at 3,200 rpm, with a compression ratio of 8.4:1. Cars with this engine could go from zero to 60 in 6.6 seconds. Only 646 GTO cars were made with this option.
I started drooling after reading about the 71 and 72 GTO specs !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Signed, I LOVE 1971 AND 1972 PONTIAC 'A' BODIES!!!!!!!!!!!!
