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small block guru's help 340/360????'s #139558 10/21/08 02:06 PM 10/21/08 02:06 PM
Joined: Jun 2004 Posts: 1,323 La Grange, Ky 70rrclone OP pro stock
70rrclone OP pro stock Joined: Jun 2004 Posts: 1,323 La Grange, Ky	i have a set of .030 pistons laying around for a 340, is it possable to bore a 360 block .070 and use them in the 360? if so what other parts does it take. i'm thinking no but thought i would ask. Thanks Shane

Re: small block guru's help 340/360????'s [Re: 70rrclone] #139559 10/21/08 02:11 PM 10/21/08 02:11 PM
Joined: Jan 2003 Posts: 9,826 las vegas 70AARcuda master
70AARcuda master Joined: Jan 2003 Posts: 9,826 las vegas	depends on the compression height of the pistons...the low compression 340 pistons can be milled to fit...but you will have a high compression 360 then... also...the 360 block will need to be sonic checked before boring .070.. it would be far easier to sell the 340 pistons and buy the correct 360 pistons... 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)

Re: small block guru's help 340/360????'s [Re: 70AARcuda] #139560 10/21/08 02:12 PM 10/21/08 02:12 PM
Joined: Jan 2003 Posts: 25,200 Upper Midwest M MoparforLife Too Many Posts
MoparforLife Too Many Posts M Joined: Jan 2003 Posts: 25,200 Upper Midwest

Re: small block guru's help 340/360????'s [Re: 70rrclone] #139561 10/21/08 02:25 PM 10/21/08 02:25 PM
Joined: May 2007 Posts: 209 New Zealand S solidcam enthusiast
solidcam enthusiast S Joined: May 2007 Posts: 209 New Zealand	As AARcuda has said it depends on the type of piston and the compression height.Also the cylinder head type,combustion chamber may be a factor(what heads are you using).I always go for the minimum over-bore on a factory block to keep the walls as thick as possible and would not even consider going that far.Even if the sonic checked out the minimum oversize allows re-building in the future.

Re: small block guru's help 340/360????'s [Re: MoparforLife] #139562 10/21/08 02:48 PM 10/21/08 02:48 PM
Joined: Jun 2004 Posts: 1,323 La Grange, Ky 70rrclone OP pro stock
70rrclone OP pro stock Joined: Jun 2004 Posts: 1,323 La Grange, Ky	the 340 pistons i have are the trw L2322F they have quite a dome on them. out of curiosity will they stick out of the bore too far or be too far in the hole. thanks

Re: small block guru's help 340/360????'s [Re: 70rrclone] #139563 10/21/08 03:29 PM 10/21/08 03:29 PM
Joined: Jan 2003 Posts: 2,111 Bowie, MD R Reggie top fuel
Reggie top fuel R Joined: Jan 2003 Posts: 2,111 Bowie, MD	360 takes a shorter piston than the other LA engines due to the longer staoke and same length rods, so a 340 domed piston will stick out of the bore.

Re: small block guru's help 340/360????'s [Re: Reggie] #139564 10/21/08 07:24 PM 10/21/08 07:24 PM
Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska R RapidRobert Circle Track
RapidRobert Circle Track R Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska	Quote: so a 340 domed piston will stick out of the bore. stroke difference is .270" so the(340) pistons will be .135" higher in the bore & diff pistons have diff compression heights but those will undoubtedly be way too tall. live every 24 hour block of time like it's your last day on earth

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