Man it has been a loooong time since I saw a set of Mickey Thompson Sportsman "I"s! Used to have a set of those on my 67 GTO back in the mid 80s. I sold that GTO years ago but have a 65 thats getting a 69 428 motor in it and have a 68 400 HO car that is all original. Love the GTO! Used to run a Crower Solid in my 70 TA with a 65 421 HO motor in it. Very nice sir!
@@tunnelportterror It ran very good. 1970 TA - 421 HO 4 bolt -.060 over. Flat top pistons, SD rods (73-74), N 455 Crank 10/10, #12 RAIII heads, T400 with factory 12 bolt and 4.10s. No traction with anything on street. Car would run 11.60s at 122 back in 1990. Weight was 3400 pounds. 1/2" fuel lines and a blue pump. Needed a better intake than the Edelbrock torker. Crower solid 533/555 304/312 252 260 @.050. Harland Sharp 1.65 Roller Rockers. Was a good combo. Except for about 12-1 compression with the 72cc heads on a basically 455 motor.
@@tunnelportterror it actually had a 455 crank so it was a 455 standard bore. I ran 36 total timing @16 initial with 100 octane or higher. I would have to run Superfuels (VP race gas 105). Back then it was about $3.50 a gallon. I could run two cans of 104 real lead octane booster and 93 octane fuel but it would have to be about 14 initial and 32 total. Still would spark knock though.
@@tunnelportterror 100% agree. I’m building a 428 motor for my 65 GTO and will be a milder combo. Will probably spend the money on some Kaufman heads and intake but nothing crazy. Planning on a 10.5-1 ratio because of the aluminum heads. Hyd roller cam but similar in lift and duration as the crower solid I mentioned earlier. Def going to non ethanol fuels. Will get a T56 and keep the 12 bolt that’s in it. Building it to drive and race. Will see how it goes from there.
Man it has been a loooong time since I saw a set of Mickey Thompson Sportsman "I"s! Used to have a set of those on my 67 GTO back in the mid 80s. I sold that GTO years ago but have a 65 thats getting a 69 428 motor in it and have a 68 400 HO car that is all original. Love the GTO! Used to run a Crower Solid in my 70 TA with a 65 421 HO motor in it. Very nice sir!
How did that 421 run ?
@@tunnelportterror It ran very good. 1970 TA - 421 HO 4 bolt -.060 over. Flat top pistons, SD rods (73-74), N 455 Crank 10/10, #12 RAIII heads, T400 with factory 12 bolt and 4.10s. No traction with anything on street. Car would run 11.60s at 122 back in 1990. Weight was 3400 pounds. 1/2" fuel lines and a blue pump. Needed a better intake than the Edelbrock torker. Crower solid 533/555 304/312 252 260 @.050. Harland Sharp 1.65 Roller Rockers. Was a good combo. Except for about 12-1 compression with the 72cc heads on a basically 455 motor.
@@tunnelportterror it actually had a 455 crank so it was a 455 standard bore. I ran 36 total timing @16 initial with 100 octane or higher. I would have to run Superfuels (VP race gas 105). Back then it was about $3.50 a gallon. I could run two cans of 104 real lead octane booster and 93 octane fuel but it would have to be about 14 initial and 32 total. Still would spark knock though.
@@whodatnunyabiz6050 yeh when they did away with 100 octane pump gas, they sorta castrated the old high cr v8's
@@tunnelportterror 100% agree. I’m building a 428 motor for my 65 GTO and will be a milder combo. Will probably spend the money on some Kaufman heads and intake but nothing crazy. Planning on a 10.5-1 ratio because of the aluminum heads. Hyd roller cam but similar in lift and duration as the crower solid I mentioned earlier. Def going to non ethanol fuels. Will get a T56 and keep the 12 bolt that’s in it. Building it to drive and race. Will see how it goes from there.