09/02/2026
BIG BLOCK CLONES LLC
236cc - 72mm x 58mm Small GX Cast Short Block Kit Everything you need to assemble a 236cc small block GX200 clone Short Block. You will need to clearance the block and your cam, but this crank, rod, and piston will all fit into the TC225 block with the piston 0.016” below the deck. Use a head gasket with a minimum of 0.045”/1.1mm thickness. Clearancing will be required for assembly.
Recommend pairing this kit with a 308 cam, our Level II Shredder head with 30mm PWK carburetor kit, 1.3:1 or 1.4:1 ratio rocker arms, and a set of 5.380” x 1/4” chromoly pushrods.
This kit includes the following:
72mm bore x 136.8mm deck height TC225 block
Cast aluminum 7 bolt side cover
Forged 58mm crankshaft with GX200/Clone (1.181”/30mm) rod journal
ARC 6271 billet 3.323” connecting rod
72mm bore x 23mm compression height x 18mm pin x .550” pin height cast aluminum flat top piston kit with rings, pin, and clips
2x Crankshaft bearings
2x Crankshaft seals
2x Magnetic drain plugs with safety wire hole
1x Oil sensor and governor hole plug kit
1x pair of side cover dowels
1x pair of head dowel pins
1x set of grade 10.9 side cover bolts
1x set of grade 10.9 head bolts
Gasket kit
72mm x 0.045” thick head gasket
Optional:
ARC billet flywheel of your choice: 6619, 6669, or 6689. Adds $120.00
ARC 6057 dual ball bearing billet side cover kit: Also removes one of the bearings, one of the seals, side cover dowels, and the side cover bolt set that you don’t need from the final price. Adds $108.61
Professional assembly service: We clean, measure, clearance, and assemble all of these components into a pre-built short block that’s ready for your blower tins, recoil, head, and carb to be bolted on for only $400.00 extra
