71 383 .030 over .012 in the hole trw 2315s 906 heads good valve job mopar 509 cam matching springs m1 single plain intake 830 hp holley 4000 ptc converter 4.56 gears 9"slicks in a 3400lb duster 7.60 91.00mph 1/8 mi got less than $1200.00 in long block don't really consider it a dog.