Edelbrock
Edelbrock's Glidden Victor II Pro-Port (PN 773169; $911/each; $2,225/each fully prepared by Kuntz and Company) cylinder heads are sold bare. They feature small ports and combustion chambers, and thick walls for heavy modification by professional engine builders and head porters. The castings are designed for racing classes that require in-line valve positioning (Victor IIs have an 11.25-degree valve angle) but allow port relocation. The big dogs of Outlaw 10.5 and Pro Street use hardware like this, as it truly is in the outer stratosphere for churning out solid power from a 9.2- or 9.5-deck, stroked, or 351W.
Glidden Victor SC-1 Pro-Ports (PN 770769; $1,025 each; $2,825 each, fully prepared by Kuntz and Company) are Edelbrock's top-of-the-line race castings. Like the Victor II Pro-Ports, these heads are served up in bare form only, leaving engine builders to the task of shaping, porting and designing a head that can flow as much as 440 cfm on the intake side. An 8-degree valve angle (SC-1 Pro-Ports feature a twisted-style combustion chamber for true, canted valves) are one of the keys to these heads contributing to the production of 2,000 horses (and then some) from big-cube, big-power-adder, small-block Ford engines.
Ford Racing Performance Parts
Ford Racing Performance Parts also brings a serious bare casting to the table for small-block Fords. FRPP's High-Port heads (PN M-6049-SC1; unfinished chamber [40cc-70cc]; 2.180-inch intake valve; $1,195 each) are canted-valve, raised-runner (0.400-inch over Yates C3 heads on the intake and exhaust sides) castings that also require extensive porting. With the right amount of time invested, the heads definitely can be formidable players on engines that power drag-, sprint-, and circle-track race cars.
RHS
Although Racing Head Service is better known for its Brand-X head castings, the company's Pro-Elite series for small-block Ford race engines should not be taken lightly. Pro Elites are RHS's biggest and baddest 20-degree cylinder heads for Blue Oval bullets; offered in 205cc and 221cc (intake-runner volume) configurations. Pro Elites (PN 35020/205cc; 62cc chamber; 2.05-inch intake valve; $1,846.32 and PN 35025/221cc; 62cc chamber; 2.08-inch intake valve; $1,846.32) are fully CNC ported and receive a multi-angle Serdi valve job prior to porting, which gains them as much as 5-percent more airflow. RHS recommends racers use the Pro Elite castings for 289-to-351W-powered drag and circle-track engines that get high in the revs.
Trick Flow
Trick Flow's original High Port aluminum cylinder heads arguably are castings that helped kick off the high-performance, small-block Ford head revolution. And, as a testament to how good the OG heads really are, you can still find vintage High Port Street/'Strip heads on some of the fastest Fords around. Today's High Ports (PN TFS-51700001; 64cc chamber; 2.02-inch intake valve; $1,399.95/pair) still have the same patented valve spacing, interlocking ductile-iron valve seats, and thick decks as the originals, as well as excellent cooling characteristics. Most importantly, High Ports flow! Entry into each 192cc intake port has been reshaped to help seal the area along the port roof, and the 87cc exhaust ports are raised 0.750-inch over a stock head's port floor, to increased the exit flow of spent gasses (custom headers are required for High Ports).
CNC Race (also known as "R") cylinder heads (PN TFS-5240T005-C01; 65cc chamber; 2.08-inch intake valve; 225cc intake-runner volume; $2,949.95/pair) are the highest-flowing, bolt-on castings in Trick Flow's Twisted Wedge family. The ported, race-ready heads feature enormous (100cc volume) exhaust ports that are raised 0.500-inch from stock, and flow 341 cfm through the intake ports and 271 cfm out the exhaust ports at 0.700-inch of valve lift-in box-stock form. Other race-ready features include a 0.560-inch deck surface, spring pockets machined to accept 1.630-inch valvesprings for massive, solid-roller camshafts, bronze valve guides, tungsten alloy intake seats, and copper bronze exhaust seats. Trick Flow's R heads are solid out-of-the-box performers, but the castings can be purchased in bare form, too.