Indy LAX Cyl Head on a Magnum

[mario03srt]

All,

I have been searching for details on swapping a LAX head on a Magnum 5.9 block. Can someone point me in the right direction please? I have some adj SS PRW Roller rockers with hollow Comp 7958 Hi Techpush rods currently in my 367 setup. I "guess" the PR's won't be correct any more due to possible length issues as this was a zero deck motor and we searched for these for a correct length. It will need to be remeasured.

Thanks,
Marion

 

[toolmanmike]

How do the rockers oil on the Indy heads?

 

[toolmanmike]

If the Indy heads oil through the deck to the rocker shafts they won't work on a Magnum block because Magnums oil through the pushrods.

 

[ChargedDart75]

If the Indy heads oil through the deck to the rocker shafts they won't work on a Magnum block because Magnums oil through the pushrods.

Not unless it's an early Magnum or his PRW rockers can oil through the pushrods.

 

[toolmanmike]

Not unless it's an early Magnum or his PRW rockers can oil through the pushrods.

Early Magnum?

 

[ChargedDart75]

Early Magnum?

Some of the earlier Magnums (92-94 or so) had the provision to oil the heads like an LA. Somewhere in the mid to late 90s Chrysler cut that out.

 

[1994redram]

Magnums up to 1995 had the LA oiling holes. They weren't used on the magnum heads. But the block was drilled for it.

I have a 1994 5.9 in the garage and a 1995 5.9 we built for my dads truck. Both of them have oil holes. The 1996 5.9 in my dart doesn't have the holes. There were quite a few small changes made to the magnums in 1996.

 

[mario03srt]

Current setup had hollow pushrods.

COMP Cams Hi-Tech Pushrods 7958-1

Marion

 

[vitamindart]

hollow pushrods are just part of it, the rockers need to be set up for oiling from the pushrod.

 

[mario03srt]

PRW Rockers

3231811 - Small Block Mopar 273-360, 1.5 Ratio, Complete Kit

 

[mopar65]

PRW Rockers

3231811 - Small Block Mopar 273-360, 1.5 Ratio, Complete Kit

My 2000 360 magnum has the 1.6 PRW Rockers. I have the new 190cc trick flow heads on my 360. I am oiling through the push rods, with a comp 550 solid lift cam and Howard's EDM lifters

 

[str12-340]

LAX heads on a Magnum are a terrible idea... you should send me a PM and I'll buy them from you

 

[mario03srt]

My 2000 360 magnum has the 1.6 PRW Rockers. I have the new 190cc trick flow heads on my 360. I am oiling through the push rods, with a comp 550 solid lift cam and Howard's EDM lifters

mopar65, The magnum head is a pedestal mounted rocker not a shaft mounted arrangement as on the LA setup. Thanks.

 

[mopar65]

mopar65, The magnum head is a pedestal mounted rocker not a shaft mounted arrangement as on the LA setup. Thanks.

Hi yes I know that. I was trying to say that you can use LA heads on a Magnum block as long as you Use Rocker arms that will do push rod oiling.

 

[mopar65]

Here is a pick of the trickflow head on my 5.9 magnum motor.

 

[mario03srt]

Here is a pick of the trickflow head on my 5.9 magnum motor.

View attachment 1715628927

View attachment 1715628929

'65

Is the TF head a LA or Magnum based design?

Thanks
Marion

 

[mopar65]

'65

Is the TF head a LA or Magnum based design?

Thanks
Marion

LA Design