What Jim said is correct, the GSX Apollo was a one year, '74 only car, was available with the Chevy straight six, Buick V6 and Buick 350 V8, it was an option, which included the GSX stripes and Buick V8 350 engine, only, but there are rumors of 455's being available, check out
Here for more info on engine availabilty, R
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Roberta
BCA #16798
BCA Board of Director,1997-2003
BCA WEBMASTER
http://buickclub.org/Buicktown
Buicktown Chapter Director 2010
'68 GS350,4-sp '68 GS400 Convertible,4-sp,'66 Wildcats,'70 GSX Stage 1,'70 Skylark Racecar,'73 GS455,'86 Grand National,7124 miles, #12 of 200 Silver Arrow Riviera, 174K miles