Need help matching heads to cam

[84oldsmo]

Hi I'm here fora Lil help from who ever can . I have a brand new chevy 350/290 Mr goodwrench I win in a local raffle well I was given a summit 1105 kit I'm wondering what heads would wake this cam and motor up. Not looking to change piston or anything on bottom end I already have a pair of headers and I planned to use qjet carb and edelbrock preformer intake

Cam specs
Basic Operating RPM Range:2,400-6,000

Intake Duration at 050 inch Lift:224

Exhaust Duration at 050 inch Lift:234

Duration at 050 inch Lift:224 int./234 exh.

Advertised Intake Duration:298

Advertised Exhaust Duration:304

Advertised Duration:298 int./304 exh.

Intake Valve Lift with Factory Rocker Arm Ratio:0.466 in.

Exhaust Valve Lift with Factory Rocker Arm Ratio:0.487 in.

Valve Lift with Factory Rocker Arm Ratio:0.466 int./0.487 exh.

Lobe Separation (degrees):114



Motor specs

Specifications

• 4-bolt main with 2-piece rear main seal

• Nodular iron crankshaft

• 4.000'' bore x 3.480'' stroke

• Internal balance

• LT1/LT4 powdered metal connecting rods

• Cast aluminum pistons (dished)

• 8.5:1 compression ratio

• Hydraulic flat tappet cam (.383"/.401" Lift, 194 / 202 Duration @ .050", and 112° lobe separation)

• Cast iron cylinder heads with 76cc chambers

• 1.940'' Intake / 1.500'' Exhaust valves

• 1.250'' diameter valve springs

• 1.5:1 ratio rocker arms

• 3/8'' pressed-in rocker studs

• Any help is appreciated thanks

 

[383_GrandPrix]

Is this a gen 1, 2, or 3 small block?

 

[383_GrandPrix]

If it's a gen 1 (pre 86 block) these heads are some of the best heads you can buy, and not much more expensive then a set of edelbrock heads.

https://www.summitracing.com/int/parts/bro-1011004/overview/?retaillocation=int

 

[84oldsmo]

Is this a gen 1, 2, or 3 small block?

It's a new black but it's made like the gen 1 block

 

[84oldsmo]

It's a new block but it's made like the gen 1 block

And thanks for ur reply

 

[lilbowtie]

What are you planning on doing with this engine and what is the rest of your combo.

 

[motorheadmike]

This cam (https://www.summitracing.com/int/parts/sum-1106/overview/), plus these heads (https://www.summitracing.com/int/parts/nal-12558060/overview/) and this intake (https://www.summitracing.com/int/parts/edl-7116/overview/) and a 650cfm carb. Low-13s, high-12s. Done.

I built near this exact combo.

 

[Bar50]

Vortec heads

Any 64cc head will go a long way.

 

[383_GrandPrix]

He stated that he is looking to get some heads that will match the new cam he has:

"Basic Operating RPM Range:2,400-6,000

Intake Duration at 050 inch Lift:224

Exhaust Duration at 050 inch Lift:234

Duration at 050 inch Lift:224 int./234 exh.

Advertised Intake Duration:298

Advertised Exhaust Duration:304

Advertised Duration:298 int./304 exh.

Intake Valve Lift with Factory Rocker Arm Ratio:0.466 in.

Exhaust Valve Lift with Factory Rocker Arm Ratio:0.487 in.

Valve Lift with Factory Rocker Arm Ratio:0.466 int./0.487 exh.

Lobe Separation (degrees): 114"

 

[383_GrandPrix]

This is a pretty aggressive cam profile. You have 73 degrees of overlap, but you're not getting much lift with factory spec rockers. To get the most out of this cam I would use a higher ratio rocker arm, it will keep the same cam timing and duration but provide more lift. You will however, need to change your pushrod length to achieve proper geometry with the longer rockers. Also make sure that the springs that come on the new heads will handle the lift and ramp rates of your new cam. If your springs are not strong enough you can end up with valve float, and if your lift height gets too high for the spring you end up with coil binde.