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68 340 Manual Cam Spec's vs Auto #2020519 02/27/16 12:24 AM 02/27/16 12:24 AM
Joined: Jan 2003 Posts: 8,940 Holly/MI D Dean_Kuzluzski OP master
Dean_Kuzluzski OP master D Joined: Jan 2003 Posts: 8,940 Holly/MI	Got a little dispute with some folks as to the factory spec's of the 68 340 Manual trans spec's camshaft vs the automatic equip'd cars. Other guy says it is only in the LSA (lobe separation angle). IIRC, it is more than that, 268 vs 284 advertised intake duration seems to be the range of difference. Alright, found an old 1968 ad, it says 284/292 duration, 445/455 lift, with 60 degrees overlap. Auto/trans spec was 268 advertised IIRC? Seems pointless now, but what say you..... Thanks Dean R.I.P.- Gary "Coop" Davis 02/09/68-05/13/04

Re: 68 340 Manual Cam Spec's vs Auto [Re: Dean_Kuzluzski] #2020537 02/27/16 01:03 AM 02/27/16 01:03 AM
Joined: Mar 2003 Posts: 18,678 Fresno, CA Jim_Lusk I Live Here
Jim_Lusk I Live Here Joined: Mar 2003 Posts: 18,678 Fresno, CA	Auto cam was .429/??? lift as I recall (manuals are all out in the shop).

Re: 68 340 Manual Cam Spec's vs Auto [Re: Dean_Kuzluzski] #2020540 02/27/16 01:12 AM 02/27/16 01:12 AM
Joined: Feb 2015 Posts: 2,074 CA C crackedback top fuel
crackedback top fuel C Joined: Feb 2015 Posts: 2,074 CA	Auto cam was 268/276 .429/.444 68 4 Gear 276/284 .444/.453 Auto cam exhaust lobe became intake and 440-4hp intake lobe was used for exhaust lobe, IIRC.

Re: 68 340 Manual Cam Spec's vs Auto [Re: Dean_Kuzluzski] #2020547 02/27/16 01:32 AM 02/27/16 01:32 AM
Joined: Jan 2015 Posts: 74 California, United States and ... D Dibbons member
Dibbons member D Joined: Jan 2015 Posts: 74 California, United States and ...	My understanding is that the 1968 advertisement was either a misprint or during final production the manual camshaft was tamed down a little as per above posts, but still a hotter camshaft than the automatics.

Re: 68 340 Manual Cam Spec's vs Auto [Re: Dean_Kuzluzski] #2021328 02/28/16 03:33 PM 02/28/16 03:33 PM
Joined: Feb 2004 Posts: 92 Harlan, Ky O Orange_Duster member
Orange_Duster member O Joined: Feb 2004 Posts: 92 Harlan, Ky	Auto cam #2899206 .050 duration 210 intake 220 exhaust. Manual cam (1968 only) #2899205 .050 duration 220 intake 228 exhaust.

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