Which heads for 521 in heavy street car?

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Which heads for 521 in heavy street car?

Post  64galaxie on December 3rd 2017, 9:39 pm

Thinking about building a 521 for my Galaxie. Weighs 4247 with me in it. Currently has mild 460 with comp magnum 292 cam, stealth intake, lightly ported doves, zero decked with stock dove pistons, 950 Holley hp.
Wanting to build a 521 pump gas motor, going to stay hydraulic cam, flat tappet or roller. Car has a 3800 10" converter in it now. I'm pretty sure my headers are actually for a cobra jet head. Been looking at the TFS street heads or the 280cc AFR heads. Kind of wanting to use my stealth intake. Car currently runs 7.90 in the 1/8th. But I can still take it on road trips. I only have a 3.70 gear in it now. Not wanting to change that, seams to work pretty good on the highway.

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Re: Which heads for 521 in heavy street car?

Post  FalconEh on December 3rd 2017, 11:36 pm

PM sent
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Re: Which heads for 521 in heavy street car?

Post  dfree383 on December 4th 2017, 12:06 am

TFS streets would work fantastic IMO.

I'd do a pump gas 545 and tighten up that convertor
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Re: Which heads for 521 in heavy street car?

Post  64galaxie on December 4th 2017, 9:39 pm

Or would scj's work better?

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Re: Which heads for 521 in heavy street car?

Post  wayney on December 6th 2017, 10:08 pm

I would do scj or P51's . my pump gas 10:1 p51 headed motor went 6.70's on 91 octane c6, 3.50 gear at 3900lbs. but it has a solid roller.

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