67 GTO 455
Thread Starter
4th Gear Member
Joined: May 2005
Posts: 1,116
From: Chitown
67 GTO 455
So i went racing last night and i ended up racing a 67 GTO with a 455 HO dropped in it... It was a Heads/Cam car with a performance Carb and some suspension work, but he was sitting on street tires... So i lined up with him and my brother flagged and right off the line i put 3 cars on him and i just kept pulling.. by the end of the 1/4 i had him by prob 10 car lengths, it was a joke...
Thread Starter
4th Gear Member
Joined: May 2005
Posts: 1,116
From: Chitown
RE: 67 GTO 455
I drive a 86 Mustang GT too many mods to list out here so if ya wanna see the mods go to this site --> http://www.cardomain.com/ride/672744/1 Mod that isnt on the site is a NX Wet kit with jets for a 250 shot, doesnt feel like too much though... also it says i have 4.10s but i blew those out and i had to go stock so i ave 2.73s
Mustang Nazi
Joined: Sep 2004
Posts: 13,444
From: Texas, baby
RE: 67 GTO 455
ORIGINAL: redmustang83596
455 C.I. High Output big block motor.. it didnt come in the 67 but it came in the 71 or 72 i think and he rebuilt it and dropped it in..
455 C.I. High Output big block motor.. it didnt come in the 67 but it came in the 71 or 72 i think and he rebuilt it and dropped it in..
2nd Gear Member
Joined: Nov 2004
Posts: 219
RE: 67 GTO 455
First year for the 455 HO was 1970. It was a D port head, casting number 64, 360 gross hp. Nothing to sneeze at.
1971-72 had the round port 455 HO that was similar to the 400 Ram Air IV but with lower compression.
1973-74 was the only years for the 455 SD (Super Duty), these things were monsters. Low compression race engines with forged rods. Non SD Pontiacs had armasteel rods, similar to cast and RPM limited.
The Super Duty's go back to the early 60's before GM's racing ban, when Pontiac owned Stock and Super Stock drag racing and were doing very well in NASCAR.
I own a 72 455 HO Formula, with traction it runs mid 12's NA on pump gas, without it barely breaks into the 13's. Way too much torque for street tires.
I also have a 70 455 HO GTO, but it has later heads on it so it will run on pump gas. The 70 had 10.7:1 and with iron heads requires race gas. 4000lb car with 2.93 gears ran 13.50@105 all motor.
FYI, (and I know this is a Ford forum, I also own more than a few of those as well) all Pontiacs other than the 301 have the same external dimensions and use the same length rods. They changed bore and stroke to change displacements. So they are neither a bigblock nor a small block, as Ford, Chevy, Buick, Olds, Chrysler all had big and small blocks. Pontiac only one, and with the new aftermarket blocks 600+ci is available. Bore is the limiting factor.
Not all 455's will run, the wrong cam heads and tires will kill it. An intellegently built one will run quite impressively. its very easy for me to believe you beat one, especially spraying. If you would like more of a challenge, I can arrainge it for you...
1971-72 had the round port 455 HO that was similar to the 400 Ram Air IV but with lower compression.
1973-74 was the only years for the 455 SD (Super Duty), these things were monsters. Low compression race engines with forged rods. Non SD Pontiacs had armasteel rods, similar to cast and RPM limited.
The Super Duty's go back to the early 60's before GM's racing ban, when Pontiac owned Stock and Super Stock drag racing and were doing very well in NASCAR.
I own a 72 455 HO Formula, with traction it runs mid 12's NA on pump gas, without it barely breaks into the 13's. Way too much torque for street tires.
I also have a 70 455 HO GTO, but it has later heads on it so it will run on pump gas. The 70 had 10.7:1 and with iron heads requires race gas. 4000lb car with 2.93 gears ran 13.50@105 all motor.
FYI, (and I know this is a Ford forum, I also own more than a few of those as well) all Pontiacs other than the 301 have the same external dimensions and use the same length rods. They changed bore and stroke to change displacements. So they are neither a bigblock nor a small block, as Ford, Chevy, Buick, Olds, Chrysler all had big and small blocks. Pontiac only one, and with the new aftermarket blocks 600+ci is available. Bore is the limiting factor.
Not all 455's will run, the wrong cam heads and tires will kill it. An intellegently built one will run quite impressively. its very easy for me to believe you beat one, especially spraying. If you would like more of a challenge, I can arrainge it for you...
2nd Gear Member
Joined: Mar 2005
Posts: 213
From:
RE: 67 GTO 455
Good kill, even though it would almost hurt my feelings to beat an old muscle car.
I'm an old school Pontiac fan myself. I like the mid 60's cars. Dad had a 65 GTO with a 389, tri power, and 4 speed. In 65 the GTO wasn't the faster car Pontiac made, it was the Catalina 2+2 complete with a 376hp. tri power, 421 and 4 speed. I saw an old magazine ad were these to cars raced. Both ran high 13's and the catalina won. It was heavier and got better traction. I think both cars got the Royal Bobcat treatment.
I'm an old school Pontiac fan myself. I like the mid 60's cars. Dad had a 65 GTO with a 389, tri power, and 4 speed. In 65 the GTO wasn't the faster car Pontiac made, it was the Catalina 2+2 complete with a 376hp. tri power, 421 and 4 speed. I saw an old magazine ad were these to cars raced. Both ran high 13's and the catalina won. It was heavier and got better traction. I think both cars got the Royal Bobcat treatment.