Originally posted by 30-A Rider
Thanks for the input gentlemen.

John you know hwat I am building and Im just trying to comprehend what those Canfield heads will run like compared to lets say Brodix RaceRite oval port aluminum heads with the 270cc oval ports VS. Canfields 310cc rect port

to refrsh for any appretiated additional comments here is the build to this point:

454 .030 over
Cast iron crank (10/10)
Stock rods with ARP harware
TRW forged small dome pistons (L2349F; LS6 repo piston)
Howards cam: 304/314 adv dur; 234/240@.050;
.540/.540
110 LSA
Some type of dual plane intake (rpm air gap)
750-800 cfm, vac secondary holley type carb

going into a 66 chevelle
Th400 Trans with 2500-3000 stall
3.73:1 rear gears approx
(NOT a daily driver. 95% street driving, occasional strip; like most trying to get the most fun out of what I got)

I love the price and value of Canfields heads...but once you buy them with the CNC upgrade to be sure equal comb chamber size they cost just a few hundred less than some quality oval post aluminums with smaller intake runner sizes. Like I said just trying to educate myself best as possible before making a purchase.

Thanks again for sharing your smarts gentlemen.
Well it sounds like your gonna have a screamer to begin with, im not too good on the particulars with runner cc's but i know oval ports are really good for for low rpm torque, or street use, once you start getting into large runners your looking to get alot of upper rpm torque, looking at your build sheet it looks to me like you built you motor for mid rpm 2500-6500 rpm maybe 7000 rpm's
power, Personally i think if i was going to build a motor like yours, naturally aspirated, i would go with a good set of rect. port heads
but you need to keep in mind your running a cast crank and stock rods also, you may want to take into consideration horsepower, if you break a rod in a bigblock at upper rpm's usually the only thing salvageable is like the intake and the headers.. Just a suggestion. Canfield heads are really really good heads for the money. brodix makes really good stuff also but they cost alotta$$$ Anyway good luck with your project, i love to hear about people building some real big block horsepower, be it chevy, or or even.....moper oops i meant mopar lol only kidding let us know how it works out for ya later,Joe