1979 might have had the dual bolt pattern TH-350 because it was the last
year of Olds starfire was manufactured. Its V8 version had Chevrolet built
305 and TH-350. This also made possible to get almost any Olds with 305 as
a dealer option. At 1980 this wasn't possible anymore and it's not likely
to own a 1980 Th-350 with dual pattern.
Anyway I would give an effort to replace 260 with some "nickel free" 305.
If you want it light get a late model Olds 307 with roller cam and a _good_
If you want it to grunt get an Olds 455 and machanic double pumper carb. It
will fit very easily even with A/C.
In the 455 case you might want to change the front coil springs to heavy
duty springs too ;)
-TH (http://drive.to/oldsclub )
If you have that type of setup, you can go with
Using M2, Opera's revolutionary e-mail client: http://www.opera.com/m2 /
Very true on the 455. but be careful..you have to run STOCK valve covers or
they will not clear the AC. My dad had that problem when he stuffed a 455
in a 1986 Cutlass. As far as the springs go, you can get a pair from a
Cutlass Salon (or 442/Hurst Olds) with the FE-3 Sport Suspension and it
should hold things up nicely. I do not remember if my dad changed the
springs on his car or not...it was a V-6 from the factory
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