Small Block Heads. MOTOR TRAXX MOPAR TECHLINEby Bob Doty. Small Block Heads. The subject for today. There are numerous all out performance heads available on the market, but I prefer to deal with readily available, relatively inexpensive swap meet and junkyard material. The focus is on the restored or restified street driver and occasional performance Mopar. The introduction of the 2. As most of you know, these small block engines were loaded with performance potential. With the new block design came a new wedge head. By 1. 96. 8, performance had reached a new level the legendary 3. The well known X Casting, with 2. Gone were the poly heads and heavy blocks. Small block performance per cubic inch was on par with the big boys. The 6. 8 7. 1 X head had large intake valves, 6. They are considered the premier performance bolt on for the small block engine. The downside is that they command relatively high prices at swap meets. The last X head was produced almost 2. Along comes the next generation of small block heads the common 3. J. I have personally seen early J heads with 2. Chrysler was downplaying performance by 1. This is not bad news. J castings are plentiful and inexpensive. The small intake valve is actually an advantage. Why When you find a set of heads and take them to your favorite machine shop, have 8 new 2. When you enlarge the seats for the oversize valves, it will be on fresh material, and will not sink the valve in the seat. As for the intake and exhaust ports or runners every 3. With a good 3 angle valve job, minor pocket porting and cleanup you will have a very good street strip head. After 1. 97. 3, most 3. This is an added bonus for street performance and reliability. The 6. 8cc head will be approximately c after milling for straightness. The TA heads have identical porting and runners as any 3. Offset Driver Heads' title='Offset Driver Heads' />In fact, the head carries the 3. J casting number. The intake rocker was offset and the pushrod hole was elongated to provide provisions for porting. Offset Driver Heads' title='Offset Driver Heads' />There is no performance advantage to these heads as cast. In addition, not one of these engines was every produced with 4 bolt main caps. They did have provisions to install 4 bolt main caps a thicker main web and filled pan rail. Do not spend big dollars on identical heads. Leave these for the people who need them for a restoration. Note when I say not produced. I am referring to production line vehicles. This is why the small block responds so well to headers or the early 3. Return to the HMCC Tech Page. Return to HMCC Home Page. Check out the GMC Sierra 2500HD review at CARandDRIVER. Use our Car Buying Guide to research GMC Sierra 2500HD prices, specs, photos, videos, and more. Unless highlighted, all die heads come complete with selected dies and are set at the factory. Highlighted die heads require assembly with supplied dies. 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High Speed RH3. 69. High Speed for Stainless Steel RH3. Shop for highquality clone fairway woods, fairway wood heads of most popular pro line styles at a fraction of the price from Monark Golf. The F6 Driver is our longest most forgiving adjustable driver featuring simple front or back CG adjustability to maximize distance through optimized launch and spin. HTB1SpcbMVXXXXXiXVXXq6xXFXXX5/1-4-Magnetic-Angle-Bit-Driver-Adapter-Screwdriver-360-Degree-Adjustable-Thumb-Flange-Off-Set-Power.jpg' alt='Offset Driver Heads' title='Offset Driver Heads' />NPSMAlloy RH3. API High Speed 8. Model No. 1. 2 RNPTAlloy RH3. High Speed LH 3. High Speed RH3. High Speed for Stainless Steel RH 3. High Speed for PVC RH 8. High Speed for Plastic Coated Pipe 5. Alloy for IMC RH 9. NPSMAlloy RH3. 75. Model No. 1. 1 RNPTAlloy RH3. High Speed RH3. 70. High Speed for Stainless Steel RH3. NPSMAlloy RH3. 71. BangOMatic Bangster 100 Beta Titanium Driver 430cc TICN Black W430 The BOM Bangster OL. This is our original Bad Boy golf club. The BOM Bangster was designed. UNCModel No. 0. 0 RB14. TPI51. 61. 8 TPI38. TPI71. 61. 4 TPI12. TPI91. 61. 2 TPI58. TPI34. 10 TPI78. TPI1. TPIAlloy RH3. Alloy LH 3. UNF2. 8 TPI2. 4 TPI2. TPI2. 0 TPI2. 0 TPI1. TPI1. 8 TPI1. 6 TPI1. TPI1. 4 TPIAlloy RH3. Alloy LH 3. 77. Unless highlighted, all die heads come complete with selected dies and are set at the factory. Highlighted die heads require assembly with supplied dies. All matched threadersets include die heads, ratchet assembly, ratchet handle and specified dies. Not for manual hand threading. RATCHET THREADERS 0. R, 1. 2 R, 1. 1 R British International StandardsCat. No. Nominal Pipe Size in. Model No. OO RBSPTAlloy RH6. High Speed RH6. 57. Model No. 1. 2 RBSPTAlloy RH6. High Speed LH 6. High Speed RH 6. Alloy for JIS RH 9. BSPPAlloy RH 4. Model No. RBSPTAlloy RH6. High Speed RH 6. High Speed LH1. 30. BSPPAlloy RH 6. British International Standards. Cat. No. Nominal Pipe Size mm. Model No. 1. 1 RISO Alloy RH7. Unless highlighted, all die heads come complete with selected dies and are set at the factory. Highlighted die heads require assembly with supplied dies.