mfg Posted August 24, 2014 Report Share Posted August 24, 2014 With a quick glance, what 'dead giveaway' will differentiate an early Avanti '327' GM engine from the later '350' version? (Both engines with plain rocker covers..NO decals!) Link to comment Share on other sites More sharing options...
Avanti83 Posted August 24, 2014 Report Share Posted August 24, 2014 Staggered valve cover bolts on the 327 Link to comment Share on other sites More sharing options...
brad Posted August 25, 2014 Report Share Posted August 25, 2014 Oil filler on the valve covers instead of tube pressed into intake manifold Link to comment Share on other sites More sharing options...
Gunslinger Posted August 25, 2014 Report Share Posted August 25, 2014 The early 327 would had the oil filler pipe at the front of the intake manifold and no caps or PCV in the valve covers. Link to comment Share on other sites More sharing options...
mfg Posted August 25, 2014 Author Report Share Posted August 25, 2014 Great answers!......But there's one more very important and quite obvious item.....In plain sight! Link to comment Share on other sites More sharing options...
brad Posted August 25, 2014 Report Share Posted August 25, 2014 later ones would have the Rochester quadrajet as opposed to the AFB. Link to comment Share on other sites More sharing options...
mfg Posted August 26, 2014 Author Report Share Posted August 26, 2014 later ones would have the Rochester quadrajet as opposed to the AFB. OK....but that's really not it..(Hint...This is actually a part of the engine...not an accessory like a carb or alternator or starter.) Link to comment Share on other sites More sharing options...
bigdaddy Posted August 26, 2014 Report Share Posted August 26, 2014 The vibration damper on a 327 is thinner than a 350. Also there is not a bolt in the center to hold it on. Link to comment Share on other sites More sharing options...
mfg Posted August 26, 2014 Author Report Share Posted August 26, 2014 The vibration damper on a 327 is thinner than a 350. Also there is not a bolt in the center to hold it on. Wow...another difference.....good info, but still not 'IT'! Link to comment Share on other sites More sharing options...
bigdaddy Posted August 26, 2014 Report Share Posted August 26, 2014 (edited) OK! Let's try this one. Early 327 (#461/#462) heads have No accessary holes in the front of the heads. Edited August 26, 2014 by bigdaddy Link to comment Share on other sites More sharing options...
mfg Posted August 26, 2014 Author Report Share Posted August 26, 2014 OK! Let's try this one. Early 327 (#461/#462) heads have No accessary holes in the front of the heads. ALL GREAT INFO GUYS!.....but you still haven't hit on a very obvious part (If it's there) Link to comment Share on other sites More sharing options...
mfg Posted August 28, 2014 Author Report Share Posted August 28, 2014 AND THE MYSTERY PART IS!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!................A road draft tube! Link to comment Share on other sites More sharing options...
Avanti83 Posted August 29, 2014 Report Share Posted August 29, 2014 AND THE MYSTERY PART IS!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!................A road draft tube! I think we are going to differ on what is "dead obvious at a quick glance" on this one on an installed engine. Link to comment Share on other sites More sharing options...
mfg Posted August 30, 2014 Author Report Share Posted August 30, 2014 I think we are going to differ on what is "dead obvious at a quick glance" on this one on an installed engine. If one looks for the presence of a road draft tube as a quick indicator of an early small block Chevy,.....I'd really have to say it's quite obvious (IMHO) Link to comment Share on other sites More sharing options...
bigdaddy Posted August 31, 2014 Report Share Posted August 31, 2014 (edited) If one looks for the presence of a road draft tube as a quick indicator of an early small block Chevy,.....I'd really have to say it's quite obvious (IMHO) "Unless" the tube and baffle under the intake manifold were removed and Pcv system was installed. Fairly common practice. Edited August 31, 2014 by bigdaddy Link to comment Share on other sites More sharing options...
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