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stock 70 340 can help... #1719592 01/01/15 09:18 PM 01/01/15 09:18 PM
Joined: Jun 2013 Posts: 54 US B BLACK71 OP member
BLACK71 OP member B Joined: Jun 2013 Posts: 54 US	Been driving myself crazy trying to decide on a can swap for my 340....not going with anything outrageous just thought it'd be time for a little upgrade...I am looking for something "plug and play" and was looking at the Comp xe268h..but with the "kit" you can purchase through jegs/summit comps site says head machining is necessary...any advice or other can suggestions? Stock spec 70 340..auto...rear gears swap between 323 and 391.... Stock exhaust manifolds and a six pack on top...tires are 27" tall but will be running some smaller diameter drag radials for strip time...no power brakes etc so vacuum is not a huge concern..car has a 2500 stall converter also....sorry to bug everyone with another can choice thread but I am fed up enough with it all I was about ready to just buy the MP 488 cam RMNS 10:9-10

Re: stock 70 340 can help... [Re: BLACK71] #1719593 01/01/15 09:27 PM 01/01/15 09:27 PM
Joined: Jan 2003 Posts: 751 Saint Peters, MO B Brian super stock
Brian super stock B Joined: Jan 2003 Posts: 751 Saint Peters, MO	The XE268 is a perfect camshaft for that application. 1971 6.1 Gen III Hemi Duster

Re: stock 70 340 can help... [Re: BLACK71] #1719594 01/01/15 09:54 PM 01/01/15 09:54 PM
Joined: Apr 2005 Posts: 12,271 Overpriced Housing Central RobX4406 I Live Here
RobX4406 I Live Here Joined: Apr 2005 Posts: 12,271 Overpriced Housing Central	I thought the 901 spring fit on a stock head. It's a 1.494 OD spring. Catalog has no mention of machining, only when you get to the 995 double spring of the XE274H and up. The XE268H is a good camshaft. Set initial timing in the 14-18 range, total below ping and it should run really well.

Re: stock 70 340 can help... [Re: RobX4406] #1719595 01/01/15 11:00 PM 01/01/15 11:00 PM
Joined: Jun 2013 Posts: 54 US B BLACK71 OP member
BLACK71 OP member B Joined: Jun 2013 Posts: 54 US	You're right I looked at the wrong footnote...it said that it needs adjustable rockers?!?!

Re: stock 70 340 can help... [Re: BLACK71] #1719596 01/01/15 11:44 PM 01/01/15 11:44 PM
Joined: Jan 2003 Posts: 16,376 D dogdays I Live Here
dogdays I Live Here D Joined: Jan 2003 Posts: 16,376	Only if you don't have the right length pushrods. Adjustable rockers are the crutch. That's my opinion. R.

Re: stock 70 340 can help... [Re: BLACK71] #1719597 01/02/15 12:15 AM 01/02/15 12:15 AM
Joined: Apr 2005 Posts: 12,271 Overpriced Housing Central RobX4406 I Live Here
RobX4406 I Live Here Joined: Apr 2005 Posts: 12,271 Overpriced Housing Central	Quote: You're right I looked at the wrong footnote...it said that it needs adjustable rockers?!?! There are many SB mopars running that cam with stock style non-adjustables.

Re: stock 70 340 can help... [Re: RobX4406] #1719598 01/02/15 12:33 AM 01/02/15 12:33 AM
Joined: Jun 2013 Posts: 54 US B BLACK71 OP member
BLACK71 OP member B Joined: Jun 2013 Posts: 54 US	And that's what I thought I busted wanted to make sure...do the kits maybe come with a different heighth lifter? RMNS 10:9-10

Re: stock 70 340 can help... [Re: BLACK71] #1719599 01/06/15 12:51 AM 01/06/15 12:51 AM
Joined: Jun 2013 Posts: 54 US B BLACK71 OP member
BLACK71 OP member B Joined: Jun 2013 Posts: 54 US	.....or what about a solid cam.... RMNS 10:9-10

Re: stock 70 340 can help... [Re: BLACK71] #1719600 01/06/15 01:06 AM 01/06/15 01:06 AM
Joined: Jun 2003 Posts: 52,972 Romeo MI MR_P_BODY Master
MR_P_BODY Master Joined: Jun 2003 Posts: 52,972 Romeo MI	Quote: And that's what I thought I busted wanted to make sure...do the kits maybe come with a different heighth lifter? Possible but if the lift is greater then that means the base circle is cut down deeper.. and if it is then the push rods will be short... if you know the difference of the base then you can figure the new push rod length... but I always like to measure the proper push rod length with the new cam in place and use a adjustable push rod to check it... if its a hyd cam find out what the company wants for pre-load and figure that in also if your not using adjustable rockers

Re: stock 70 340 can help... [Re: MR_P_BODY] #1719601 01/06/15 10:46 PM 01/06/15 10:46 PM
Joined: Jan 2003 Posts: 3,103 Phila Pa S scatpacktom master
scatpacktom master S Joined: Jan 2003 Posts: 3,103 Phila Pa	I'm curious about your black 71? And this "stock" 70? Just what are we talking about here?

Re: stock 70 340 can help... [Re: BLACK71] #1719602 01/08/15 11:24 PM 01/08/15 11:24 PM
Joined: Jan 2003 Posts: 6,840 The Swamp S Sixpak master
Sixpak master S Joined: Jan 2003 Posts: 6,840 The Swamp	I replaced an old street hemi grind in a 70 340 with the XE268. 3.55 geared E body, stock manifolds, 4 speed. Plenty of good mid range, nice idle, stuck it in dot to dot and let it eat. Real good choice. Don't over think it - pull the trigger, it's a good cam.

Re: stock 70 340 can help... [Re: BLACK71] #1719603 01/09/15 01:13 AM 01/09/15 01:13 AM
Joined: Jul 2006 Posts: 9,366 Lehigh Acres, Florida rickstershemi master
rickstershemi master Joined: Jul 2006 Posts: 9,366 Lehigh Acres, Florida	Swapped a XE268H into my sons stock rebuilt 360 LA Long-Block using the stock valve gear.....ran like a scalded dog....no issues Weiand Stealth DP Manifold, 600 AFB, Long-Tube Headers. Rickster

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