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[Unit 5302]

Mr 5 0 has personally witnessed a "stock" 1987 Mustang 5.0 LX driven to a 13.8, basically off the showroom that day.

Anyway, there is something totally screwed in the combo. That's plain as day. I don't see any traction issues worth noting on a 13.5@103. Not the best in the world, but even with an awesome launch on a drag setup you're talking low 13's to ultra ultra high 12's. You know, the same performance a stock engined 5.0 can turn in.

I see nothing wrong with the AFR heads. The 185's don't hurt low end as much as it's being made out to be, you should really learn about them instead of using old school head design thoughts. On a 331, the effect should be even less. I'd like to know the specifications on those pistons. How much dish, how much valve relief? I can calculate your compression ratio accurately.


I see nothing wrong with the cam. It's more than enough for a standard compression 331 street motor.