Quote:
Originally Posted by FireSail
AFR 1399 heads on a Ford Racing BOSS block. The one listed in the guide as a replacement for small block Ford. It was less confusing when they just called it the Ford Racing Sportsman block. You can build a SS BOSS with AFR heads, but it sets the purists on fire.
The pistons are Keith Black with a modest dome, 2.6cc I think. The block is 4.000 bore, which makes it a little harder to find pistons. The SRS flat tops I wanted kept slipping month to month in shipping and I ran out of patience.
My rear axle assembly comes tomorrow and I should have it all together and broken in just in time to put it up for the Winter. At least there will be a hotrod in the garage instead of a pile of parts.
Dale
Jim: AFR makes 165 and 185cc SBF heads. The 165cc model number 1399 is listed as a bolt on legal SS replacement head. No valve voodoo needed.
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Let me clarify a lot of confusion as regards to your interpretation of the rule book and the engine specifications.
The Ford Racing Boss 302 is a Windsor replacement block that can be used in any 260, 289 or 302 applications. It replaces the old Ford Motorsports R 302 block.
Although the AFR cylinder head comes with larger valves, you still have to meet the valve size specs and combustion chamber size as the original OEM cylinder head as shown in the NHRA spec just as Jim Caughlin has stated.
Your pistons also have to meet the dome configuration and dish/dome/valve relief sizes as shown in the engine spec.
NHRA Stock and Super Stock engines are no longer an off-the-shelf engine you can build. They have become high tech engines that require a lot of more work and finese that other engines.