Head Bolt Drill Fixture for Gen 3 & 4 GM LS-Series Blocks

The Tick Performance Head Bolt Drill Fixture will work on all Gen 3 & Gen 4 LS-series blocks, and includes the following:

• CNC machined 6061-T6 drill fixture place
• Drill bushing for tap drill
• Drill bushing for counterbore
• Guide bushing for tap
• Coated HSS Drill for tap hole
• Coated HSS Drill for counterbore
• Bright Finish 1/2-13 spiral flute tap
• Two (2) bushing retaining screws
• Extra long drill for tap hole operation

...and if you need to work on the lower 4 bolt holes on 6 bolt blocks (for upgrading to 3/8-16) you can add that option from the drop-down menu as well, which will add the following:

• Drill bushing for tap drill
• Guide bushing for tap
• Coated HSS Drill for tap hole
• Precision 3/8-16 Tap

This fixture can be used to enlarge the bolt holes in the head itself. See the VIDEO tab above for an instructional video. Contact us with questions!

Tick Performance solid-dowel pins are necessary when upgrading to 1/2in head studs. See the recommended product below. 

After performing the job on the block, you can use the DIY Head Fixture on the heads to make room for the larger studs. Bolt the fixture to your head and use the larger, 33/64in drill bit (included in the kit). This will provide ample room for the new, larger 1/2in studs. 

IMPORTANT:

The Tick Performance DIY Head-Stud Upgrade Fixture is designed to work with the Tick Performance ARP 1/2in head stud kit ONLY (GEN-IV or GEN-III). The fixture and instructions may not work with another brand 1/2in head-stud kit.

LS/LT Head Dowel Swap Tool: 

Our DIY Head Fixture tool does even more now, with the introduction of our LT/LS Swap Tool. This additional cutter tool allows you to swap heads and blocks between a Gen-V LT and Gen-III/Gen-IV LS engines. If you have an LS engine and want Gen-V LT-style heads or vice versa, this tool allows that. If you have a Gen-V LT vehicle but want all the tunability and performance of an LS top end, this tool will allow you to run LS-style heads on your LT short block. 

This tool is custom-made by our specifications and manufactured by an American-made tool company we trust. Like the rest of the kit, you can use the tool with a standard-style drill. It features a unique indication line for locating the stop collar. This drill opens up pre-existing holes for precise dowels, which are different between the two engines. 

Simply use the tool to precisely drill for at least two new dowel holes, which center the heads on the new block. Otherwise, head bolts and water jackets line up between the two engines. LS engines feature dowels on the lower outer on the block and LT on the upper outer holes. The operation can be performed on the heads or block, and generally should be on the outward locations.