You should fold!....lol I kid
That's a more realistic option, actually.What about going higher compression stroker for now with stock block and if you want more power later build an aftermarket block for boost then?
Do you know if heads are 58,60, or 72 cc version?
Take a 351ci block use the 347 crank assembly except the rods. Fit the bill for long rods. Torque curve and octane tolerance goes WAY up.
Are you suggesting using a 347 crank in a 351w block?
Yes. It's been done several times due to the strength of the 351w block. But as op stated he's not going this route as most won't cause there's a lot more cost involved with switching everything over to a tall deck block.
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Not to derail or hi-jack this thread but... Could you please show some links for that swap? The main bearings are a completely different size.
Thanks.