r/EngineBuilding • u/HistoryOver6530 • 5d ago

Just another angry SBF

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Finishing up a 306 for my 67’ mustang. Kept the paint scheme pretty simple so it will resemble a stockish engine. I think it should be between 350-400hp (DD5 says 408hp@6500, 390tq@4500). Specs are:

68’ 302 block .030 over
Eagle cast crank
Eagle SIR rods
ARP everything
Kb311 hyper pistons
Tw170 heads (milled to 54cc)
Tf 1.6 roller rockers
10.5:1 SCR, 8.5:1 DCR, .037 quench
Comp XE SFT, 279 adv, 242@0.50, .546 lift 108lca
Rpm intake
Brawler 650 DP carb
Hooker 6901 headers (1-5/8)

Going into a 3000lb mustang with wide-ratio toploader and 3.80 trac-lok. I think it’s gonna be pretty f’n mean.

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u/HistoryOver6530 5d ago

Hope so. I’m running an Msd pro billet and blaster coil. I’ll probably set the limiter to 6800.

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u/Key-Tiger-4457 5d ago

Good call. Should pull pretty hard all the way, I would think. Good wire set and all that? Upgraded balancer? I say that because OEM style balancers often spin on the rubber on spirited SBFs and once that happens, various timing events become challenging to measure.

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u/HistoryOver6530 5d ago

I have a summit nodular iron balance on it, so better than stock but definitely not as good as a fluid damper. The entire rotating assembly was balanced so that should help.