Join Date: Jun 2013
Location: Stanislaus Co. Ca.
Heads for my 421 build
I've started to save my pennies to purchase the heads for my antique sbc 421" build.
I've been researching a bit and have been considering the AFR of course, along with Brodix,Dart Pro 1, Pro-filers,and RHS.
Based on AFRs recommendation, the AFR 210 Comp Eliminators.
RHS recommended a 180! I thought that seemed a bit small for a 421".?
I haven't heard back from Brodix,but I was looking at the CNC Brodix 210 "wild thing" heads they have.
I have an email into Speier Racing for info on his econo ported Pro-filer head.
I haven't spoken to anyone about the Darts yet, but I've read a few things online,that they can work pretty good with a little work.
My engine specs.
6" rod, flat tops,
Not too crazy on the cam, hyd roller.
241/247 duration @ .050
I have a holley 750dbl pumper new in a box,
along with a new Edelbrock rpm air gap that I've had sitting around for a couple of years.
I'll most likely be looking at 72 ~ 76cc chambers to keep the compression streetable on 91 octane. 10.7:1 or so.
Next time I go down to the machine shop I'll sit down with my machinist and ask his opinion also, I just thought some of your opinions or experiences could be helpful also.
1968 Butternut Coupe,
421" Dart SHP block
TKO 600 RR
Dutchman 9" w/3.70 US Gear Lightning r&p
Speedtech torque arm,Ridetech HQ coilovers
Global West arms
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