can you tell us more about this build.

Here is a pick of my 454 bore notch. When Valako did this to my blocks he said he saw 25-30hp on back to back dyno runs. I believe they pulled the heads off on the dyno, bore notched the engine, and then made more dyno pulls. This was a built 454 and I believe it was running 2.30" valves.
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+1 an Jim Valako. Jim can compete on price and his BBC heads will flow more and make more power than the AFR 305 heads. Also, the AFR exhaust ports are something less than great. As you are also in MI, it is worth a phone call.

Just curious how much power will these heads make? and what's wrong with the AFR exhaust port?

Ive seen a few engine builders and cylinder head specialists state that, the published flow numbers on the AFRs, do not live up to their claims. .

As far as JimV, he used to be the go to guy here on oso years back for cylinder head work. http://www.valakoraceheads.com/

He had alot of happy customers right here on oso. He probably doesnt post much any more because of threads like this one below.

http://www.offshoreonly.com/forums/g...s-540-sci.html

My build is not looking for the absolute max hp. It was supposed to be a low dollar re-fresh of a 25yr old engine. It has grown exponentially.

1988 Mag 454 bored .030
Wiseco pistons +21cc domes
K1 rods
AFR 305 cyl. heads 114 cc chambers
Scorpion rockers 1.7
Victor Jr manifold
Holley 850 carb
Gil manifolds w/ Hardin aluminum risers wet
Morel roller lifters
Cam TBD Bob Madura will be consulted

Rookie Thanks for the pic. It is worth a thousand words.

Thanks

I'm not going to ruin the OP's thread I'll start another thread on this.

Sounds like a nice build

that's why I said 3/16" of an inch is ample... there will be no ring interference regardless of "0" decking the block

Did the bore notching today.
Big thanks to Rookie for the pics.
Did not make a template. Used the head gasket, layout dye, a sharpie and a drum sander to notch the bores.

On my way back together.