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The block is a 70 396/402 The heads 3993820 are 71 396 and 454 LS3 LS5 300hp 2.06/1.72 valves factory These are my guesses Hope this helps Walt >===== Original Message From [EMAIL PROTECTED] ===== >OK gang, > what do i have(its a big block-supposed ta be out of a '70 4spd) > block:3969854 > date: either-6 6 17 or G G 17 >heads:39938020 > date:(left)l 21 70 > (right)b 3 71 >crank:3904815nf > GM4 > 1 28 8 > >if ya can tell me what it came in(like i said-supposable a 70 4spd) >what horse power it suports >what motor dessanation it covers(ie:ls4-ls5-ect,ect) >head specs: intake runners/exhaust runners/chamber volume/avaiable >valve sizes(i belive these are 2.19/ect) >pistons are .030/402-.060/396--".015 in the hole" with a .117Dome -- >compression ratio???? > any help will be GREATLLY APREICATED!!!!!!!(excuse the spell'n) >if we get in to too much detail u can e-mail me with any pertanet info >at my e-mail ----- and thanks for any and all help --------- > >Robert O. Means II > Livermore,Calif > USA > [EMAIL PROTECTED] ----------------------------------------------------- To Unsubscribe please visit www.chevelles.net/list.html To start a new topic, send mail to: [EMAIL PROTECTED]
