Our Pro Power cylinder heads...
Our Pro Power cylinder heads were two of the first units offered to the general public. They gave us peak flow numbers of 264 cfm at 0.750-inch lift after Carl McQuillen gave them a quick port tune-up.
While working on this project, Dale had an interesting offer. During the time it took to collect the block, all the parts, and get lined up with our machine shop, Dale had worked a deal to offer his own high-performance aluminum cylinder heads to the market. So, for the first time, you're going to get a look at the new Prime One 210F cylinder head (PN 575-21210). Like the Prime One line of stroker kits, this cylinder head offers the end user an incredible source for increased performance at a tremendous value. These aluminum small-block Ford cylinder heads have 210cc intake-runner volume, 75cc exhaust-runner volume, and a 60cc combustion-chamber volume. The 210F is designed for 2.02-inch intake and 1.60-inch exhaust valves, but you can stick 2.08-inch intake and 1.625-inch exhaust valves in them. They are machined for a half-inch head stud, and they come with hardened valve seats. The exhaust port is raised 0.250-inch, and they offer a 51/48-inch-thick deck surface.
Dale reported out-of-the-box flow numbers of 256 cfm at 0.700-inch lift on the intake and 180 cfm at 0.700-inch lift on the exhaust. As you can see in our accompanying flow-bench chart (courtesy of Carl McQuillen's Racing Engines), we got almost the exact numbers on the intake, but the exhaust was a little lower than reported. Of course, that could be because of the variance in flow benches. The bottom line is, at only $695 a pair (bare), the 210F offers an incredible value. Pro Power plans to offer this head-complete with components for a hydraulic-roller cam-for only $925 a pair. They were the perfect heads for Cheap Franky's project small-block.
 Use a dial indicator, with...  Use a dial indicator, with the number-one piston at top dead center, to degree the camshaft. This technique synchronizes the camshaft's position with the crankshaft. Usually, the timing-chain set lines up everything for you, but when you're replacing everything in the bottom end with a stroker kit, it's a good idea to check for yourself. |  This shows Brett working over...  This shows Brett working over the short-side radius of the head with a sand roll as well as cutting the valve seats. |  |
 With the heads assembled by...  With the heads assembled by Brett, Scottie and Chris quickly get the top-end build underway. The heads are carefully lowered into position and torqued to spec. A digital torque meter verifies all the torque values. |  |  The timing-chain cover and...  The timing-chain cover and balancer are the next pieces to be added. |