Cylinder Head Modifications For Larger Rocker Studs

Check out Kalvinator Engines: www.kalvinatorengines.com
I purchased larger diameter rocker studs for my engine. These new studs are stronger, but we needed to make the threaded holes larger to accommodate the new studs. The old studs were 5/16", the new ones 7/16".
In the process, Kevin Frische shows the differences in taps, as well as a few techniques that can be applied the next time you need to tap something. These tips will help you get straight threads with less issues.
The Rocker Studs I used: www.compperformancegroupstores...
The Adjustable Guide Plates I used: www.compperformancegroupstores...
Thanks to Kevin Frische for his help in this video.
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Engine Details
Displacement: 363cid
The Block: www.pbm-erson.com/Catalog/PBM/...
The Crank: www.pbm-erson.com/Catalog/PBM/...
The Heads: performanceparts.ford.com/par...
Compression: 8.9:1
The Cam: Comp Cams custom grind: 222@.050" 222@.050 .357"lobe lift .571" valve lift (1.6 rocker) .351" lobe lift .562" valve lift (1.6 rocker) 114º separation 4ºadvance
Modified: Edelbrock Performer RPM intake
The Carburetor: www.holley.com/products/fuel_...
The Distributor: www.msdperformance.com/produc...
The Ignition: www.msdperformance.com/produc...
The turbo Kit: www.on3performance.com/shop/19...
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