350 Small Block Chevy Small block options:Rod I beam Std option - H beam LT1 LT4 Gm Performance new

LT1 LT4 Gm Performance new block in sealed GM crate manufacturer part number 19431901

These short blocks include: Remanufactured Ford OEM Fully Machined Romeo or Windsor engine blocks and new 4340 forged crankshaft (check your flywheel for fitment)

If you have special needs

LT1 Oil System Type: Dry Sump Block: GM LT4 6

350 Small Block Chevy Small block options:Rod I beam Std option - H beam LT1 LT4 Gm Performance newMesa Balancing Racing Engines uses a GM remanufactured 1 piece rear main seal block which is steel shot prepared magnetic particle inspected and fully blueprinted by machining every critical machine surface first we align hone second we parallel deck then we finish the cylinders with a torque plate to the proper finish and piston to wall clearance for the pistons being used. When the machine work is completed we debur the bottom of the cylinders hand