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#1
04-24-2016, 06:43 PM
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1970-71 427 454 512 4 bolt Short Block
Selling a used 4 bolt main 512 short block that just came out of storage since the 80's. The casting number is 3963512 dated H2570. It is bored what looks fresh .030 over with 7-Manley #5600 pistons and 1-TRW L2300 piston. They appear to be 11-1 I think by the dome size. I took photos of the tops. Must of had issues at some time to switch the piston. There is no cam in it but has new cam bearings. The crank is a 6223 I have not pulled a cap to see if its turned. The lifter valley area has been smoother off. There is no stamping on the pad. Price is 2100 plus shipping. I'll put it inside a GM engine crate and deliver it to a terminal buyer pays shipping. Call or email Larry 520-349-2337
Also have a set of 840 heads that were for this. 
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#2
04-24-2016, 10:08 PM
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Re: 1970-71 427 454 512 4 bolt Short Block
Looks like 11:1 slugs ...
__________________
You've never lived until you've almost died -- for those who fight for it, life has a flavor the protected will never know!
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#4
04-25-2016, 03:51 AM
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Re: 1970-71 427 454 512 4 bolt Short Block
TRW LF2300 is a 10.25:1 w/closed chamber heads. Can't verify the Manleys, but they look to be the same.
Two guys commented that with L2300 .030 & using 104 cc and 109.4 cc heads, their respective compression ratio was 9.60 & 9.40 (estimated).
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 69 SS/RS 396 M20 X22 Nor 12B,72B,712 bought 1979 FULL OWNER HISTORY 69 Dick Harrell tribute Day II 427 M20 4.10 X11 76 orig pnt, 711 67 Super Stock 302 Camaro re-creation
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#5
04-25-2016, 01:24 PM
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Re: 1970-71 427 454 512 4 bolt Short Block
3/8"rod bolts? Dimple?
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69 RS/Z 302 VE3 Daytona 69 Chevelle SS 396 375 69 T/A clone LS6/6 speed 90 Formula 350
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#6
04-25-2016, 01:34 PM
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Re: 1970-71 427 454 512 4 bolt Short Block
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: bbbentley</div><div class="ubbcode-body">TRW LF2300 is a 10.25:1 w/closed chamber heads. Can't verify the Manleys, but they look to be the same.
Two guys commented that with L2300 .030 & using 104 cc and 109.4 cc heads, their respective compression ratio was 9.60 & 9.40 (estimated).</div></div> Agree -- I didn't look like there was enough dome for a 12.5:1 ... still a nice piece ... TAZ
__________________
You've never lived until you've almost died -- for those who fight for it, life has a flavor the protected will never know!
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#8
04-25-2016, 04:48 PM
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Re: 1970-71 427 454 512 4 bolt Short Block
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: lbnaz</div><div class="ubbcode-body">They are the 3/8 rods. </div></div>
should be dimple rods ?
__________________
69 RS/Z 302 VE3 Daytona 69 Chevelle SS 396 375 69 T/A clone LS6/6 speed 90 Formula 350
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#9
04-25-2016, 05:27 PM
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Re: 1970-71 427 454 512 4 bolt Short Block
Got a call about the heads. They have a light port job, complete heads dated F188 and A128. Will sell short block and heads for 2500 plus shipping. Larry 520-349-2337
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#10
04-26-2016, 04:31 PM
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Re: 1970-71 427 454 512 4 bolt Short Block
Price dropped to 2250 obo plus shipping for short block and 840 heads. I'll crate up and deliver to terminal buyer pays shipping. Larry
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