Originally Posted by Dragginwagon467
Cylinders will be honed for the rings.
Final honing will add more p/w clearance as well. This may be reason enough to look for another block? Being .060 over, have the bores been sonic checked?
Everything in this block and build could have been a little better...I’ve seen some shady stuff go together and live a happy life. This is far from that...the block does t need sonic checked, it lived 10+ years in a 10 second Nova. The loose main caps killed it, not the bore thickness or hone. The cylinders were ball-honed for ring finish.
Originally Posted by ShouldntBeHere
What heads are going on it?
With 10.75 and that cam, it should make some good power if the heads will support it.
AFR 290, as far as I know, they are the factory springs, with about three months of use. They vacuum tested perfect and the decks are flat.
The chambers did make friends with the domes on the previous engine build, just touching the heart-shaped point by the spark plugin several cylinders. This could have happened when the rod bearings failed or could have contributed to the rod bearings failing, I’ll never know - it wasn’t my circus.
To be clear, heads and roller cam came from a basket-case 467 I bought out of a 11.9-second ‘70 Chevelle. This 467 bottom end now lives with swap meet 781 heads, 238/248 hyd cam, and makes about 435 hp with very little tuning.
The block I’m using for the 496 build was a 467 as well, but bearings failed a couple times after a roller lifter failure. This engine came from a 10-second Nova.
My AFR 290cc heads did just fine on my 9.5-1 468. I think you will be happy and have a good street motor.
It should run well, I’m guessing 600+, even with all the compromises.
Originally Posted by jackie schmidt
Did you have the shop hone the block with a deck plate?
As for power, with that compression, head, cam combo, I figure 680 at around 6500.
See above, ball hone. The bore is actually quite old but straight.
Without the compromises, I’m guessing you’re on the money.