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It'll cost $30k to build 717 hp in a 440 I reckon. Like snakeoil said above, what you get with the Hellcat engine is something you can live with fairly easily. 700+ HP in a big block isn't something you just up and drive a long way in. If that's not important though, go for it.

Try looking on a different device. Way too many variables to guess what your problem is.

.750 roller in that one, again, as I recall. I can't remember anything about the heads, but probably regular iron heads with 2.14 and 1.81 valves, ported and polished with triple springs. Probably too early for Aluminum B engine heads back then (but I stand to be corrected).

Back in the day (early '80's), Larry Shepard over at Direct Connection figured that for the 9.90 class you needed to make 600 hp in a 2800 pound car. I bet quite a few guys here remember Mopar doing the work up on the 9.90 car. Duster with a tunnel rammed 440 with twin dominators as I recall...

https://www.hotrod.com/articles/indy-ez-cylinder-heads-mod-man-intake/

And I thought this thread was about Lynyrd Skynyrd!