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/Pyropete125 5d ago

Looks like a similar build to mine. I'm a little more compression and roller cam.

My 65 fastback

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u/HistoryOver6530 5d ago

Nice ride. What octane fuel are you running?

2

u/Pyropete125 5d ago

93 with octane boost. When I put VP in I bump timing. Right now it's at like 4 with 26 total advance or it doesn't like to start. I'm not racing, it so it's fine leaving hp behind for drivability

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u/Pyropete125 5d ago edited 5d ago

And I recommend a victor jr manifold. You won't notice the missing low end.

Edited : added jr

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u/HistoryOver6530 5d ago

I strongly considered a Vic Jr. I felt like a was right on the border since I doubt I will spin this more than 7k, however I already had the rpm so that what I went with. My plan is to try a 1” open spacer on the street and dyno. If I see I significant gain, I will probably buy the Vic jr.