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my 72C10 has a 383ci
383ci 9.5:1
E-tec 170cc heads
1.60 roller rockers
270hr cam
Edelbroc mpefi
383 bottem end kit from powerhouse
full length dynomax headers
X-pipe 2.25"
50 series df mufflers
3.42 gears and powertrax differential
so far im at 40k+ miles and have been happy with this setup alot great power and decent mileage for a truck I presently get between 18-20mpg
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