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1978 Chevy 305 in a Firebird? Posted By: 1980azbird On: 01-04-2008 @ 12:43:28 Reply | Edit Did the 1978's come with a Chevy 305 engine and what was base horsepower? Thanks! Brian Posted By: firebird455 On: 03-27-2006 @ 16:59:40 Reply | Top | Edit Hey man. Unfortunately the Pontiac motor was now on its last legs in 1978. 1979 would be the last year of the true Pontiac motor, the 400. (I don't count the 301, although it was a Pontiac motor, it wasn't much of a motor. In 1978, I have seen numbers for the 305 anywhere from 125 to 150 horsepower. Posted By: fast82Z On: 03-27-2006 @ 17:00:16 Reply | Top | Edit There were 305 sbc motors in firebirds in '78. There were 2 different 305's that year. Both had 8.4:1 compression and a 2-barrel carb, but one was made for California and high altitudes. The regular motor made 145rwhp@3800rpm and 245rwtq@2500rpm. The California motor made 135rwhp@3800rpm and 240rwtq@2000. -- The crap gas wonder: 1982 Z28, forged 9.75:1 383, 23* trick flow heads, 246/254 .558/.558 hyd. roller, 3.73's, 2000 stall Timeslip:http://www.fbody.com/timeslips/member.cgi?id=845 12.75@109 with a 1.90 60' AIM:CHATV400 (Feel free to hit me up.) Hear me > http://www.mainstreamtopics.com/soundclips/clips/camaro.wav  Posted By: dan On: 03-27-2006 @ 21:08:29 Reply | Top | Edit i had 2 78 firebirds with 305's..very common for the base model birds and the esprit models -- firebirdformula.net pontiac4life.com 98 formula m6 13.125 at 105.22 1.949 60' 98 formula a4 12.924 at 107.95 2.009 60' 
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