347 build questions

[Bronco2EB]

This will be my first complete engine builds, sorry in advance for all the questions! what started out as a normal 302 swap when my weak 2.9 v6 blew has now turned into a complete 347 stroker build. the parts I already have:
comp cam springs (942-16) with comp retainers, locks, etc.
Summit Racing cam (SUM-3601) with lifters
Edlebrock performer aluminum intake
Along with new gaskets, ARP headbolts, and some other small parts.

The vehicle is a 1989 Bronco 2 that is more of a street/show truck than anything that I am wanting to throw down some power. It had a 2.9 v6 in it before (so anything would be a upgrade) and i bought a ranger with a 302 thinking it would be a easier swap.. did not happen. The bearings had bad scoring in them and before I knew it I was in this motor deeper than i thought. Since I have to change some of the bottom end I figured I might as well make it a 347 and get everything new. I am looking at a scat stroker kit right now (I have not purchased it yet).
Here are some questions:

The alumimum heads I am looking at have a lower lb spring rate than My comp cam springs. Do you want a higher lb rate than lower? and are these edlebrock e-street heads a good beginner head (#5052)?

Rocker arms, are they worth it? I have read some advantages of them but will they really make that big of a difference?

Best stroker kit, The kit I am looking at is a SCAT kit
http://www.americanmuscle.com/scatstroker-347-cast-7995.html
Is this a good kit or would you go with a different kit or brand?

Thank you for looking and reading, hope to hear from you all, Thanks!

 

[minimatt]

Those heads matched with that stroker kit are going to put your compression at close to 11:1, which is rather high for that cam and your application. I've run both the Scat and Eagle cranks and rods with no complaints. I've always ordered pistons separately, but understand you are trying to stay on a tight budget. Maybe check with Scat and see if they offer that kit with dished pistons to get the compression in the low to mid 9 range. For what you are trying to do, roller rockers won't provide any appreciable performance gains. Many of the stroker kits on the market use the 28 oz imbalance. Keep that in mind if you are planning to re-use your balancer and flywheel/flexplate. Verify they aren't 50 oz.

 

[sykanr0ng]

Good roller rockers are worth it, but better to use 1.6 rockers than 1.7 as the 1.7 ratio causes faster wear to the heads due to the increased angles.

 

[KyddsPly]

What sykanr0ng said. I used a cheap set and ended up replacing the heads 7000 mile later.

 

[Ourobos]

Nothing wrong with 11:1, compression is power. Just run 93 octane and keep the timing around 10-14.

For $200 more, you could get a lot healthier head :
http://www.summitracing.com/parts/tfs-51410004-m61

 

[minimatt]

Nothing wrong with 11:1, compression is power. Just run 93 octane and keep the timing around 10-14.

For $200 more, you could get a lot healthier head :
http://www.summitracing.com/parts/tfs-51410004-m61

Those heads will actually cost him quite a bit more than an additional $200 dollars as they require Trick Flow pistons due to the revised valve angles.

 

[naneumranch]

Not trying to high jack his thread but are these heads any good ?
https://www.flootek.com/product/small-block-ford-180cc/

 

[Broncobowsher]

Not trying to high jack his thread but are these heads any good ?
https://www.flootek.com/product/small-block-ford-180cc/

But that is exactly what you are doing...

 

[naneumranch]

No he's looking for aluminum heads. I'm wondering if they will work for his set up.

 

[naneumranch]

My bad for not being specific

 

[Ourobos]

Those heads will actually cost him quite a bit more than an additional $200 dollars as they require Trick Flow pistons due to the revised valve angles.

That's the magic of the twisted wedge.. Unless his pistons are flat tops with no reliefs, you can run some major duration with these heads. I ran a Comp XE282hr with 1.7 rockers on a stock 90 Mustang shortblock, and if you think it's the lift that matters, that's over .600 lift.