Help in rebuilding 1970 charger six pac motor

[Aussieguysyd]

Hello all

I would like some advice in relation to engine parts that I need to build a 440 six pac engine for my 70 rt/se charger . I want to build the engine to factory specs ( Blue print), my charger isn't a factory six pac but I was able to obtain a set up with the manifold
built date in 1970. My car when I imported it into Australia did not have the original engine block but had a warranty block dated 69 with the pad being clean. Its a R/T S/E with a 18spline centre console so I was stoked with this .I also have a close matching numbers 906 heads that I wish to use.

Just wanting to know if the six pac set up engines had different parts other than what a 440 R/T had ?.
Etc Rods , balancer , lifters ,Cam .

Much appreciate your advice.

 

[Aussieguysyd]

Hello all

I would like some advice in relation to engine parts that I need to build a 440 six pac engine for my 70 rt/se charger . I want to build the engine to factory specs ( Blue print), my charger isn't a factory six pac but I was able to obtain a set up with the manifold
built date in 1970. My car when I imported it into Australia did not have the original engine block but had a warranty block dated 69 with the pad being clean. Its a R/T S/E with a 18spline centre console so I was stoked with this .I also have a close matching numbers 906 heads that I wish to use.

Just wanting to know if the six pac set up engines had different parts other than what a 440 R/T had ?.
Etc Rods , balancer , lifters ,Cam .Pistons

Much appreciate your advice.

 

[PurpleBeeper]

The 1970 six pack motors use the "big" connecting rods and a special harmonic balancer & weights on the flywheel or torque converter. There's "supposed" to be some other six pack differences, but not visible at all, nor do they add performance. It's "basically" a high performance (aka big rod) 1970 440 4 barrel motor with a six pack on it.

FYI - the "special" parts are not worth the time, money or performance in my opinion unless your car is an original six pack car

 

[super-bee_ski]

The 1970 six pack motors use the "big" connecting rods and a special harmonic balancer & weights on the flywheel or torque converter. There's "supposed" to be some other six pack differences, but not visible at all, nor do they add performance. It's "basically" a high performance (aka big rod) 1970 440 4 barrel motor with a six pack on it.

FYI - the "special" parts are not worth the time, money or performance in my opinion unless your car is an original six pack car

And,
The 6-Pak rods are "heavy"

 

[dvw]

No benefit of the 6 pac rods. Though the balancer will look slightly different. Definately use a better modern cam.
Doug

 

[Geoff 2]

Agree with above comments.

How original does it need to be from the outside? Or inside? Using lighter 4 bbl rods requires a different harmonic dampener, which might be noticed by a Mopar expert. A hotter cam might have some lope to it, which will indicate 'non-standard'.
The original 6 pack cam was 3 bolt mounting, reqd special low taper lifters, no longer available.
The 375hp/4bbl cam has the same specs, uses std lifters & single bolt mounting.

 

[Geoff 2]

Where are you in Sydney?

 

[RemCharger]

Agree with above, go for neutral balance LY rod motor. 6 pack cork manifold will work on any bottom end.

 

[Aussieguysyd]

Where are you in Sydney?

Hi Geoff I live in the Sutherland Shire area of Sydney

 

[Aussieguysyd]

Thanks Guys much appreciated merry Xmas

 

[6PKRTSE]

As mentioned above. The stock LY rods are fine and with an aftermarket set of lightweight pistons and balanced assembly will be a better combo then the heavier 6 pack rods. That is what I run in my 6 pack car.

 

[Daves69]

Just wanting to know if the six pac set up engines had different parts other than what a 440 R/T had ?

Around 30 bucks ...............

 

[69_A12_6BBL]

No benefit of the 6 pac rods. Though the balancer will look slightly different. Definately use a better modern cam.
Doug

Not a Fan of the OEM .268 Grind?