My WAG

I havent done anything like this, but based on other builds and the results from Jays CC build, I could say yes, but a very reserved yes

Jay got 550-ish out of a stroked 390. In theory, the peak is more of a result of cam and airflow, so you should be able to get there too.

However, he spun the 445 to 6300 with a good set of heads and a healthy cam. I doubt your C1 heads would pull those flow numbers without a professional port job.

If you copied his build, heads included, but stock stroke, and added compression for a strip only vehicle, I'd say you can get there with a 6500-6800 rpm peak, but thats now shifting at 7000 rpm with a stock block over 500 hp.

I think it would require some expensive parts to do so reliably.

Now if you are willing to stroke it, check out Jays CC build, it'd allow you to drop the rpm, and if it's race only, some additional compression may even help the cause.


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- 70 Fastback Mustang, 489 cid FE, TKO-600 5 speed, 3.70 9 inch
- 71 F100 shortbed 4x4, 397 cid FE, headers, Street Dominator, 280H, 5 lug Dana 60, 4 speed