Hi Guys, just put in a newly built 70 - 340, 40 over 10.5 -1, balanced crank, 2.02 J heads with roller rockers w bee hive springs, air gap, holley 750 DP, comp cam 20-670-4... 474/474 lift with a duration @ .050, 233/240, hooker headers.....factory 4 speed with 3.55's.....has about 100 miles on...