I have TWO Original LS-6 1970 Engines originally installed in a LS -6 CHEVELLE, they are both long blocks, 4-bolt mains ,steel cranks 7/16 Dimple rods and pistons , rectangle port heads, no distributors or carbs so dont ask, they are both standard bore , std steel cranks, dates are as follows, T0213CRR 10K1733XX L-13-9 #512 one head has a damaged combustion chamber. Price is $7500 .Also have a 1970 LS-6 Engine with CRV 4-speed engine suffix T06 June 1970 Long block assembly all STD bore $8500, Also available one 1968 427 2 bolt Block from Corvette #439 E-13-68 T0605IL 18S4232XX $3500. also many 396 blocks and heads. Many Vintage RECTANGLE PORT HEADS for numbers matching applications.