440 Engine Rebuild advice

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A friends '70 challenger 440.
Around 10.7:1, 300+cfm MCH ported Eddies
.583" sft cam with 1.6 rockers, don't know @.050
M1+ Holley 830cfm DP+1" Wilson 4 hole spacer
best to date@3800lbs, 11.0@121 = 555 track fwhp on the day...open hdrs.

Similar build, 3150lb Dart
440, 12.6:1, MCH ported Eddies 319cfm@600"
Victor intake, spacer for 1050 Dom
DC. purple .590", [email protected] sft
old iron rockers.
2" hdrs, best 10.12@132 = 599fwhp.
just for some more info, these are real world on track no's.
 
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