70 Chevelle radiator tank codes

[DaveC68]

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[DaveC68]

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[DaveC68]

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[Rixls6]

I don't get it. If your XF tank is for an automatic, maybe someone put the trans cooler into it later.
The other guys are showing an XF tank as being original to an LS6 4-speed car, which wouldn't have a trans cooler in it.

[DaveC68]

Don't know
I only saw mention of XJ and IF
mine is XF

[Mr70]

Rixls6
You're getting a lil backwards.Re-read the posts again,and you'll see it makes sense what the others have submitted.
X J is a Manual trans application,and X F is a TH400 application.
When any 1970 LS6 Chevelle was special ordered with the 4:10 posi upgrade,that canceled it's standard Big Block 3 core radiator,& it came instead with the larger capacity Big Block 4 core radiator.Which could have been either the PA manual prefix,consisting of the I F driver side tank,and X J Pass. side tank,or the PD TH400 prefix,which consisted of the I F driver side tank,and X F pass.side tank.
Understand that these two radiators were used as the Big Block Heavy Duty cooling radiators on the 1970 LS-6 Chevelle/Elcamino,but not exclusive to the them,as they also came as standard equipment on the 1970 L-34 & LS-5 Chevelle/Elcamino when equipped with optional Air Conditioning,or if just RPO KO-1 H.D cooling was ordered on them and that would include the 1970 L-78 Chevelle/Elcamino too.
In 1971,the PA & PD radiators were also available on all the BB Chevelle/Elcaminos under the similar circumstances mentioned above.
I believe your C I Passenger side tank was used on the 1972-74 GM A-bodies.

[Rixls6]

OOPS,
My bad. I was mixing up the XJ and XF.
Thanks for straightening that out.

[DaveC68]

Rick,
If I understand correctly, the XF I have would be correct for my 71 SS454 A/T Monte with air?
I guess I'll be hanging onto it.
thanks for the info.

[Mr70]

That's right DaveC.
Your 71 Monte Carlo LS-5/TH400 A/C equipped used that (4 core) P/S tank,along with the 3 core D/S tank denoted as I A,and the overall prefix tag BR.That was the Heaviest Duty radiator available for that particular vehicle.
That radiator was very popular among 1969-71 Chevrolet A & G bodies,part #3019205.

[Rainer]

[ QUOTE ]
Rixls6
You're getting a lil backwards.Re-read the posts again,and you'll see it makes sense what the others have submitted.
X J is a Manual trans application,and X F is a TH400 application.
When any 1970 LS6 Chevelle was special ordered with the 4:10 posi upgrade,that canceled it's standard Big Block 3 core radiator,& it came instead with the larger capacity Big Block 4 core radiator.Which could have been either the PA manual prefix,consisting of the I F driver side tank,and X J Pass. side tank,or the PD TH400 prefix,which consisted of the I F driver side tank,and X F pass.side tank.
Understand that these two radiators were used as the Big Block Heavy Duty cooling radiators on the 1970 LS-6 Chevelle/Elcamino,but not exclusive to the them,as they also came as standard equipment on the 1970 L-34 & LS-5 Chevelle/Elcamino when equipped with optional Air Conditioning,or if just RPO KO-1 H.D cooling was ordered on them and that would include the 1970 L-78 Chevelle/Elcamino too.
In 1971,the PA & PD radiators were also available on all the BB Chevelle/Elcaminos under the similar circumstances mentioned above.
I believe your C I Passenger side tank was used on the 1972-74 GM A-bodies.

[/ QUOTE ]

Rick - How does option VO1 heavy duty radiator fit into the mix? I have a 70 BB 4-speed car with that option. The build sheet lists a BQ radiator, and I have the original radiator with intact tanks and tag which indicate IA and XJ tanks.