Need help with bbc combo

[Twister79]

well i have an bbc 454 out of a 86 suburban with
4.310 bore
4.000 stroke
6.385 rods with ross 12:7 compresion with 106 cc heads
solid roller lifters and roller rockers and a 4500 team g intake and a 1050 dominator
well i need help choseing a cam for drag racing
and i have a choice between patriot 320 heads 119 cc 2.250/1.880 valves .700 max lift or doug hebert 320 heads 115 cc .725 max lift 2.250/ 1.880 valve which one would you use

its going in an 86 monte carlo with 4.56 gears and i have a 4500 stall and a 2800-3200 stall in the shop i can use
i just need help with a combo for 1/8 mile drag raceing

 

[454RAT]

personally I wouldnt choose either of those heads. you will only end up not happy and swapping them for what will work later. Save your money and get something better or try to scrub the internet and run some 049 or 781 casting iron heads to get by.

for a cam, I would reccommend something around 250 @ .50 duration and as close to 700 lift as you can get while staying on a 108 or 110 lobe separation. Lunati or Bullet cams are good choices. .02

 

[TRAVIS]

I have a very similar short block as you but I run factory GM aluminum rectangle port heads, 1050 dominator and had a .680 .700 296 304 Lunati roller with a 5700 converter and ran a best of 6.38 at 3400lbs. Swapped to a nitrous grind cam with .724 .719 306 319 from a 110 l/s to a 112 and ran a 6.44 and 5.80s on a 225 shot. Id look into the Comp Cam .680 .680 rollers as they make great power and are easy on valve train parts. You need at least the 400 converter and dont be so quick to shun rectangle port heads on a car with a loose converter.

 

[Twister79]

thanks guys for the help

 

[Twister79]

how about merlin III aliminum 350 cc heads or the afr 345 cc as cast heads which is the best head

 

[TRAVIS]

Neither both are way too big unless you plan on spinning it to 8500 or put it in a 1700lb car. Stick with a 305-320cc head and youll be much happier.

 

[79 surfwagon]

Patriot/Hebert

these heads are not exactly designed to perform as 'bolt on'

I believe the intention was to get a 'core' head on the market for cheap so that the individual 'do it yourself' guy could port them for real power at an affordable price.

I've heard nothing but good things about 049's and 781's that were hand ported. Why wouldn't the patriot/hebert respond the same way?

 

[TRAVIS]

Hebert heads are Procomp AKA "junk". Patriot heads are a pretty decent casting assembled in Alabama. If its a lower rpm lower compression motor then by all means a properly built set of oval ports will more than do the job but alot of people are getting good results out of even a production rectangle port as long as youve got enough converter to flash past the lower rpm range. If your converter flashes to 5500 on launch then why would you want a set of heads that make peak power in the 4000 rpm range. His choice of heads will depend greatly on the rest of the combo. All parts need to be paired together. If he chooses a rect port head then he needs a loose converter and a cam that makes power in the upper rpm range if he chooses an oval port then he can use a tighter converter and a cam that has more mid range power.

 

[Cw1228]

781's are great for me. 6.00's

 

[80superbu]

781's for me too. Motor makes about 600hp w/10.4:1 compression