427 LS 4.00 stroke sleeved block 900-1600 gm big block LT1 Oil System Type: Wet

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

300" material above top ring land) With Gas Port For Improved Ring Seal Wrist Pins: Upgraded Tool Steel

Chamfered oil holes for improved oiling to bearings

All sales on Short Blocks are FINAL

Mesa Balancing Racing Engines uses our seasoned blocks to build our  sleeved Racing long blocks which as all of our engines are fully machined  inhouse by our experienced staff as seen on our FB and IG page

427 LS 4.00 stroke sleeved block 900-1600 gm big block LT1 Oil System Type: WetMBRE completely machines balances and assembles these engines in house with the same 4340 crankshafts 4340 Hbeam rods and forged pistons as all of our combinations. By sleeving these blocks we have had the best reliability for higher Hp builds. We stock sleeves and components for quick delivery.