[wooftfd]

My son and I did a little swap...

[wooftfd]

1964 421 HO, forged rods and pistons, 9.5 CR, 068 cam in roller profile, roller valvetrain and timing, screw in studs, hardened valve seats, heads polished, crossover filled, ram air exhaust, tripower setup by Dick Boneski...
first stab at timing and idle...
https://youtu.be/7ulQyFqpuR0

[JSchmitz]

Looks and sounds great! Congrats and enjoy!

[b-man]

Very nice!

A more hopped-up version of the 421 HO I did for my Le Mans convertible.

Mine has a NOS 068 cam, Crower rods, Ross forged 27cc dished pistons for 8.8:1 compression, Crower Enduro stainless roller rockers, ARP screw-in studs, new stainless valves and hardened seats, no head porting or filled crossover and standard log exhaust manifolds. Carburetors by Dick Boneske too!

I’m a huge fan of keeping the factory look on Pontiac performance engines, the Tri-Power 421 HO engines are tops in my book.

[wooftfd]

hey B-man, your thread was one of the things that made me decide to go with the 421! Is your car on the road yet?

[b-man]

Not yet but I’ve been pushing pretty hard on it the last couple of months.

Installed the engine and transmission about a month ago, this last couple of weeks concentrating on the brakes and finishing up the exhaust.

I need to pull the front sheet metal off that’s only temporarily bolted on so I can get the car to my metal guy to replace both of the captured nuts inside the rockers that secure the bottom of the front fenders.

Same metal man is going to be doing some work on my 1957 bug (high school car I bought in 1977) before the Le Mans gets its turn, I’m doing 2 projects at once and now that I’m retired I finally have the time.

The Le Mans was kinda rough when I bought it, most old convertibles led a pretty hard life. Mechanically it was a wreck but it did retain its original 2-barrel 326, 2-speed automatic, 2.93 open rear and the factory A/C was still completely intact but needing lots of love. I couldn’t pass up a ‘64 convertible loaded with accessories like power windows, steering and A/C, you can’t be too picky when you’re lucky enough to find one this loaded.

A massive undertaking that I’ve started and stopped on over the years but I’m determined to make it road worthy even if it doesn’t end up looking show worthy.

[Cardo]

Sounds great! What mufflers do you have on there?

[wooftfd]

nice, keep it going!
dont know about the mufflers, they were un the car when i got it, and are un-marked...

[1_Wild_Cat]

Nice work woof….color me jealous. I’m doing a 421 the hard way - 4” stroke into a bored 389 block. Not even close to done though.

Sounds great. Congrats.

[grivera]

Originally Posted by wooftfd

My son and I did a little swap...

Beautiful car? Singapore Gold?

[wooftfd]

its Saddle Bronze

[grivera]

thanks - very nicely done

[johns]

That car is drop dead gorgeous! Sounds the part too-music to my ears!

[Sloan66]

Well done!

[Kenth]

Nice GTO!

I also became a member of the 421 GTO society this year.
My 1967 400 in my 66 GTO was in need of boring with new pistons and rings after 25+ years of duty, so I took the opportunity to put together my long overdue 1965 421.
It got Eagle full flow H-beam rods, KB Silvolite hypereutectic pistons, 1970 455 #64 heads with valves in stainless steel, a genuine old #744 camshaft from "Dana" with matching lifters and then of course the car's original Tri-Power which received #70 nozzles in the outer carburetors (tried #73 first, but they proved too rich) as well as another modified venturi cluster which received .035" idle tubes and .050" down channels.
Runs quite well with 14 in/hg @ 650 rpms in Drive. 10° initial plus 20° full manifold vacuum advance using a 1115364 unit that starts at about 7 in/hg and full advance at about 14 in/hg. The original 1116172 came in a couple of inches later wich the engine did not like. Now the idle is rock solid in D.
Too bad the season is over for this year already!

[Dick Boneske]

Originally Posted by Kenth

Nice GTO!

I also became a member of the 421 GTO society this year.
My 1967 400 in my 66 GTO was in need of boring with new pistons and rings after 25+ years of duty, so I took the opportunity to put together my long overdue 1965 421.
It got Eagle full flow H-beam rods, KB Silvolite hypereutectic pistons, 1970 455 #64 heads with valves in stainless steel, a genuine old #744 camshaft from "Dana" with matching lifters and then of course the car's original Tri-Power which received #70 nozzles in the outer carburetors (tried #73 first, but they proved too rich) as well as another modified venturi cluster which received .035" idle tubes and .050" down channels.
Runs quite well with 14 in/hg @ 650 rpms in Drive. 10° initial plus 20° full manifold vacuum advance using a 1115364 unit that starts at about 7 in/hg and full advance at about 14 in/hg. The original 1116172 came in a couple of inches later wich the engine did not like. Now the idle is rock solid in D.
Too bad the season is over for this year already!

Sounds like you did it right! Our Tri-Power 434's run very well with the "068" style Crower cam with about .490" lift. I only with we'd have used screw-in studs on the 716 heads.

[Tom Vaught]

I did "straight" 7/16" screw-in studs the second year I owned my car.
Then I pinned them. No issues from 1966 to 2013 with those 716 heads.

Tom V.