'67 GTO LS3 Swap

[CFster]

Did you have to drill holes in the cross member to install the small block mounts, or were you able to utilize the factory holes for for the original Pontiac mounts?




Thanks

Elongated the holes in the crossmember downwards 1/8". Used small block Chevelle frame brackets and mounts as in my quote above.

[BanditDave]

Is that all you are using for the trans cooler? If so, I would reconsider that. That thing will not produce nearly enough cooling for that trans....IMHO. If others have used that successfully then I stand corrected, but it looks like no where near enough.

That aside, great project man!!! Looking real good!

[CFster]

Got it running last this week. It's amazing how much it sounds like a late model Corvette or Camaro even with the Pypes exhaust.

[gasfumes]

Are u pleased with the gmpp harness?

[CFster]

Yeah, it's a Speartech harness, which is really the same thing for the most part, except programmed and cut to length. Piece of cake.

[analyte]

Great project!!

[CFster]

Is that all you are using for the trans cooler? If so, I would reconsider that. That thing will not produce nearly enough cooling for that trans....IMHO. If others have used that successfully then I stand corrected, but it looks like no where near enough.

That aside, great project man!!! Looking real good!

No problems so far. Been putting a lot of miles on it while I wait for a rear diff and rims to come in. Then we'll get started with the suspension and brake work as well.

[BossaNova]

Hey. Don't forget to weigh that thing.

[andrewb70]

I think they actually set forward. Look at b-man's post #163 where he used chevy mounts and had to drill new holes in frame cross member.

https://www.pro-touring.com/forum/sh...ng-list./page9

The 3 hole mounts are correct for a 67. B-man used the 68-72 big block mounts which are incorrect for the earlier cars. That's why he had to re-drill the holes.

Andrew

[CFster]

12 Bolt looks small with those mammoth brakes on there...

[cspecken]

Looks good. Can you give the details on the rear axel (Gear Ratio, type of center section, etc)? I am in the market for one but have yet to pull the trigger for my 64 GTO.


Chris

[rocketrod]

Looks great and sounds awesome!!!

[CFster]

Looks good. Can you give the details on the rear axel (Gear Ratio, type of center section, etc)? I am in the market for one but have yet to pull the trigger for my 64 GTO.


Chris

It's a Moser 12 bolt, 33 spline with 3.55 True Track diff. It's 57 3/4" wide, which is narrowed about 1" on each side.

[ProdigyCustoms]

Nice looking rear sir! Now where are those wheel photos? That deep lip is going to look sick!

[CFster]

Well since the man asked!

Courtesy of Frank at Prodigy, I just received some Boyd's PT-09s. I'm very impressed with the workmanship and think they'll look great on the car!

Can't wait to get the rear and suspension in - hopefully this coming week.

With Frank's help, the rear was narrowed 1" on each side and the backspacing on the rear wheels adjusted to match so there would be more of a dish in the rear.

Front:



Rear:



Some test fits on the brakes:

[ProdigyCustoms]

That rear end narrow and deeper lip will make a huge difference in the car. Those GTOs do not have a very deep lip at all with the stock width rear.

The Boyds have been really impressing me with their quality especially comparing cost to quality.

Can''t wait to see this one done.

Here is a GTO we have been working doing it from the bottom up; literally starting under the car, now we will freshen the paint.

When doing the suspension, brakes, wheels and rear, we narrowed rear and built deep lip 20s on rear and 19" front

[Ron.in.SoCal]

CF - rear and parts look GREAT!

The Boyds have been really impressing me with their quality especially comparing cost to quality.

Hey Frankie - I recently saw these Boyds on a72 Chevelle at a car show on Father's day. I can't tell you how clean they look in person! I was like, 'Boyd's?" Yep, very impressed.

[CFster]

Thanks Ron!

Frank, nice car. Details?

[rohrt]

Car looks and sounds great!

What did you use for bearing ends on the rearend?
What are the breaks?

[CFster]

Thanks.

It's a flush bearing end (not tapered) with bolt in axles.

The brakes are C6 Z06 all the way around.