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360 crank in a 340 block #485498 10/01/09 07:03 PM 10/01/09 07:03 PM
Joined: Sep 2007 Posts: 19 alberta, canada D drtsprt OP member
drtsprt OP member D Joined: Sep 2007 Posts: 19 alberta, canada	i was going to stroke my 340 this winter but funds won't allow it. a buddy is trying to convince me in machineing down a cast 360 crank and buy some new pistons to make 370ish cubes. the crank is free but by the time i pay for machineing and buy pistons i would think the only cost i'm saving on is the stroker crank. am i wrong, are the stroker pistons that much more? is there more machineing with a stroker?

Re: 360 crank in a 340 block [Re: drtsprt] #485499 10/01/09 07:34 PM 10/01/09 07:34 PM
Joined: Jan 2003 Posts: 20,547 Eagle, Idaho Neil The Doctor is in.
Neil The Doctor is in. Joined: Jan 2003 Posts: 20,547 Eagle, Idaho	Check with a couple machine shops to get some estimates. Turning down a 400 chevy crank in order to make a 383 out of a 350 is expensive. It's easier to just buy an aftermarket crank with the main journals already at the proper size.

Re: 360 crank in a 340 block [Re: drtsprt] #485500 10/01/09 07:43 PM 10/01/09 07:43 PM
Joined: Feb 2004 Posts: 4,501 Gainesville,FL G goldmember master
goldmember master G Joined: Feb 2004 Posts: 4,501 Gainesville,FL	Cost depends on whether you need a custom piston. KB pistons are cheap and availible up to 4.07". Have the mains turned down and it's a simple but effective swap.

Re: 360 crank in a 340 block [Re: goldmember] #485501 10/02/09 09:06 AM 10/02/09 09:06 AM
Joined: Jan 2003 Posts: 9,982 Ansonia, CT C CJK440 master
CJK440 master C Joined: Jan 2003 Posts: 9,982 Ansonia, CT	Ever consider just getting a 360? A 360 crank in a 340 is the same as a 360 with a .040 overbore. 2017 Contusion Blue Challenger T/A 392 M6 "BLKNBLU"

Re: 360 crank in a 340 block [Re: CJK440] #485502 10/02/09 10:54 AM 10/02/09 10:54 AM
Joined: Sep 2007 Posts: 19 alberta, canada D drtsprt OP member
drtsprt OP member D Joined: Sep 2007 Posts: 19 alberta, canada	Quote: Ever consider just getting a 360? A 360 crank in a 340 is the same as a 360 with a .040 overbore. yes, i'm just covering all options. i'm trying to find an older 360 block. i really want to do a stroker but won't be able to afford it this year so i wanted to freshen up and gain as much cubes for cheap.

Re: 360 crank in a 340 block [Re: drtsprt] #485503 10/02/09 12:11 PM 10/02/09 12:11 PM
Joined: Jan 2003 Posts: 75,005 U.S.S.A. JohnRR I Win
JohnRR I Win Joined: Jan 2003 Posts: 75,005 U.S.S.A.	Quote: Quote: Ever consider just getting a 360? A 360 crank in a 340 is the same as a 360 with a .040 overbore. yes, i'm just covering all options. i'm trying to find an older 360 block. i really want to do a stroker but won't be able to afford it this year so i wanted to freshen up and gain as much cubes for cheap. if that's the case I would just look for a good running 360 and do the stroker over time ?

Re: 360 crank in a 340 block [Re: drtsprt] #485504 10/02/09 12:28 PM 10/02/09 12:28 PM
Joined: May 2008 Posts: 1,131 Thigh-Gap Junction @ @#$%&*! New user name, Same old jerk!
@#$%&*! New user name, Same old jerk! @ Joined: May 2008 Posts: 1,131 Thigh-Gap Junction	I wouldn't bore a 340 block to run that crank/piston combo, wait until you can get the crank you really want. Instead, maybe do some home porting or something else to up the hp. Quote: i was going to stroke my 340 this winter but funds won't allow it. a buddy is trying to convince me in machineing down a cast 360 crank and buy some new pistons to make 370ish cubes.

Re: 360 crank in a 340 block [Re: drtsprt] #485505 10/02/09 12:44 PM 10/02/09 12:44 PM
Joined: Jan 2005 Posts: 12,419 Kalispell Mt. H HotRodDave I Live Here
HotRodDave I Live Here H Joined: Jan 2005 Posts: 12,419 Kalispell Mt.	I am close to Alberta and have a 72 360 block I might sell, PM me if you are seriously wanting an older 360 block I am not causing global warming, I am just trying to hold off a impending Ice Age!

Re: 360 crank in a 340 block [Re: JohnRR] #485506 10/02/09 01:01 PM 10/02/09 01:01 PM
Joined: Mar 2008 Posts: 5,746 Ontario, Canada Dodgem master
Dodgem master Joined: Mar 2008 Posts: 5,746 Ontario, Canada	The 360 to 340 stroker can be done inexpensively and yeald 372 (+.030) to 378 (+.060). The crank likely needs turning anyways and add about $100 to have Crank turned down to 340 size total job will be 250 to 300 turned and polished. Pistons are shelf for many manufactures so no more than a proper rebuild for either 260 or 340!!! Check out the 360 pistons with .070 suggestions for 340 block listed at Summit too http://chucker54.stores.yahoo.net/keithblack.html That said true stroker kits with or without H beam rods fully balanced come in at not much more than buying everything seperate and have a 360 crank cut down!! http://chucker54.stores.yahoo.net/inba1.html

Re: 360 crank in a 340 block [Re: Dodgem] #485507 10/02/09 01:51 PM 10/02/09 01:51 PM
Joined: Jan 2003 Posts: 9,826 las vegas 70AARcuda master
70AARcuda master Joined: Jan 2003 Posts: 9,826 las vegas	you can buy a scat cast crank 340 mains 3.58 stroke for $366 from summit. Tony 70 AARCuda Vitamin C 71 Dart Swinger 360 10.318 @ 128.22(10-04-14 Bakersfield) 71 Demon 360 10.666 @122.41 (01-29-17 @ Las Vegas) 71 Duster 408 (10.29 @ 127.86 3/16/19 Las Vegas)

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