Ok to start things off i am building a 383 that will use a small shot of nitrous. I want to get about 450 HP N/A with this motor. My 2 questions are will the heads i have posted lower be good for that much power? and if so what cam should i run. any help is wanted

"POWERHOUSE 23° Aluminum cylinder heads (2) for SB Chevrolet. 190cc Polished runner, 64cc Polished chamber. Comes assembled with stainless steel, swirl polished valves, new screw-in 3/8" studs, chrome moly guide plates, .550" lift (1.460" OD)dual valve springs, chrome moly valve spring retainers, 10° hardened valve locks, high-temp valve seals. Price is for two (2) heads.

Every Head Features:

• 3-angle valve job
• Rocker stud torque 50 ft. lbs.
• Spring pocket 1.625"
• Rocker - no offset required
• Intake valves 2.05" .100" Long
• Exhaust valves 1.600" .100" Long
• Valve angle 23°
• Intake guide material Manganeze Bronze
• Exhaust guide material Phosphor Bronze
• Hydraulic (Flat Tappet) Setup: 115lb Seat
• Solid (Flat Tappet) Setup: 140lb Seat
• Roller Springs (Hydraulic or Solid) EXTRA $$$



thanks


Colt

 

What's the flow data on them? Thats going tell the tale.

 

Prepare your heads by removing the valves and "bowl blending" them and streamlining the valve guide bosses to improve airflow. heavy porting will not be requiired but this simple bowl porting will ensure you make the power you want with these heads. Port match the intake ports of a Edelbrock Vic Jr manifold to match these heads intake ports. Likley felpro 1205 or 1206 gasket size. Set up the valve springs for 130-140lbs seat pressure.
use Isky cams #201547 Isky grind #547-A this is a solid lifter camshaft http://store.summitracing.com/partde...7&autoview=sku

Degree it in 4 deg advanced 102deg intake C/L. use 1.5:1 rockers use a 750cfm carb.
with 10:1 compression you'll have 450 hp and a ton of torque from 3000 to 6000+ rpm. Likes long tube headers and free breathing (big) exhaust.
if you're the timid type and this cam is a little too much for ya, use Comp cams hyd cam XE 284H-10 #12-250-3 and 115lbs seat pressure on the springs.
Both these cams need a 3000+stall converter and 3.73+ gearing.