Pontiac Rally Rim Identification

[PeteLeathersac]

A guy offered me a cheap set of 4 Poncho 5-Spoke 14" Rally Rims (#'s below)...claims they're off a '68 but I'd guess more recent?.
Can anyone identify these and if they're worth bothering with?.

YH 05 30 85 991 14+6 JJ MW5 T

Thanks!.
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~ Pete

[Jim Ferron]

14x7 Rally II 4.75" JH JJ(?) JK JS KS 525709

70-73 Firebird
74-75 Firebird
69-73 Grand Prix
74-75 Grand Prix
73-75 Le Mans
77-79 Phoenix
72 Tempest
75-77 Ventura II

[PeteLeathersac]

Thanks for that much so far..
Does anyone know what the decode is for the dates etc?.

Here's more #'s off the rims..

M55 6 3 KX

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~ Pete

[Jonesy]

Manufactured June 3, 1975

[PeteLeathersac]

Thanks!.

If they're from '75, that pretty much gives me a reason to say no right there as considering the amount of cars probably built w/ them, they'd be easy to obtain if req'd...if '68 vintage, I'd probably think differently?.

Have a great weekend!.
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~ Pete