[mtrunz]

I'm in the middle of an LS swap restomod for my 66 GOAT and having interference issues with the "muscle car" oil pan the engine builder installed. It hits the front (stock) frame cross member and steering linkage. I was steered toward a Mast Motor Sports 409-069 cast alum pan which was supposed to be designed specifically for 64-72 GM A Body LS swaps. If the Mast pane doesn't work, I'll have to buy a steel pan and modify it as needed to compensate for any internal or external interferences.

In speaking with one of the techs at Mast who had a hand in the design, he shared that the test car for the pan design was actually his son's 69 Chevelle. He has no external interference issues in the areas that I have trouble which is promising but is the 66 GTO frame and steering linkage similar enough to the 69 Chevelle for me to expect their pan to solve my problems? The engine I'm installing is a 4.125 LS3 stroker with a full windage tray (4L80 trans). Internally, the pan should work because the builder has used this engine, windage tray and pan combo many times without issues. The problem seems to lie in how much alike the front frame cross member and steering linkage is between the 66 GTO and 69 Chevelle. Does anyone know how the two compare?

 

[ExcellenceAuto]

They are both GM A bodies from the same era.
That should make it ok, but I am not real familiar with that part of those models.
Someone here will give you a solid answer soon.

 

[LATECH]

64-67 frames are pretty much the same, cept convertible
68 up are 3 inches longer, not sure where the change is
Could be part of the problem

 

[mtrunz]

64-67 frames are pretty much the same, cept convertible
68 up are 3 inches longer, not sure where the change is
Could be part of the problem

Thanks for the reply LATECH. I was under the impression any increase in length would only affect the rear but I'm no expert and don't know that for a fact.
The interference with the current pan has nothing to do with the 69 frame. It's the potential replacement pan that may or may not interfere. I'm hoping someone here can clarify
if the pan that works in the 69 Chevelle would offer the same clearance with the 66 GTO.

 

[LATECH]

i am not sure about it, but you are likely correct about the back end of the frame being the part that was lengthened
Of course it could still mean that the firewall and everything else is shifted also
I will look around a bit to see if I can come up with something

 

[LATECH]

Maybe look here

Search results for query: ls swap

www.gtoforum.com

 

[LATECH]

Look here...

MuscleRods 68-72 Chevelle LS Conversion Kit

Evolve that classic GM muscle car into a fuel efficient, ground pounding Muscle Rod using LS swap products from BRP Muscle Rods

www.brphotrods.com

Note that is says 68 + up

 

[LATECH]

Or...

LS conversion kit for 1964-1967 Pontiac GTO/LeMans models...

YEARONE Classic Car Parts for American Muscle Cars | Barracuda Cuda Challenger Charger Chevelle Road Runner Camaro Super Bee Dart Duster Valiant Firebird GTO Cutlass 442 Mustang Nova GM Truck Skylark GS Monte Carlo El Camino Mopar Chevy

www.yearone.com

 

[LATECH]

and this...

Parts You Will Need To Do An LS Swap

Do you know where to find the parts to physically bolt an LS engine into a classic Chevy?

www.chevyhardcore.com

Sorry to blow up the thread. But I hope this helps yu find info on what to do/ direction to go etc

 

[mtrunz]

Maybe look here

Search results for query: ls swap

www.gtoforum.com

The pan they're using looks similar to one I've looked at so I asked for them to share some dimensions with me to compare. Thanks for the advice. It's is greatly appreciated!

 

[mtrunz]

and this...

Parts You Will Need To Do An LS Swap

Do you know where to find the parts to physically bolt an LS engine into a classic Chevy?

www.chevyhardcore.com

Sorry to blow up the thread. But I hope this helps you find info on what to do/ direction to go etc

Not at all. Thank you for taking the time to lend some much appreciated advice.

 

['48 Austin]

Click on below for oil pan dimensions. Pick what works for you. Commonly people use an F Body oil pan from a Camaro or Firebird. Don't forget to get the mating pick up tube.

Chevy LS Oil Pan Dimensions - Google Search

 

[lmsport]

I used a Holley pan for a 66 Chevelle. Did require trimming the windage tray from the LS3 Camaro donor engine.

 

[mtrunz]

Click on below for oil pan dimensions. Pick what works for you. Commonly people use an F Body oil pan from a Camaro or Firebird. Don't forget to get the mating pick up tube.

Chevy LS Oil Pan Dimensions - Google Search

Thanks for posting Austin. I'm truly grateful for your time and effort but I've researched pans (that should fit) to death and found out the hard way they don't necessarily fit without interference. The manufacturers have poor data and won't promise anything. They'll accept a return if they don't work but I need to avoid the time and expense of trying and returning pan after pan until one doesn't interfere.

What I really need is to find someone who knows how a stock 69 Chevelle front frame section and steering linkage compares to that of a 66 GTO or someone who has a 66 GTO with a stock frame and steering linkage using a 4.125 - 4.25" LS stroker that can tell me what pan they used,

 

[lmsport]

Also take note of the engine mounts used---they don't all sit at the same height