421 swap from alky to pump gas

[johnsonguthrey]

Might be a dumb question but! I'm thinking about taking my 421 off alky and running it on pump gas. Right now, it has 18CC, 11-degree angle and .030 step domes. What would it take and what would I lose by doing this? 

[locogato11283]

What's the compression? You may need to run race fuel.

[ClaudeMachining]

Might be a dumb question but! I'm thinking about taking my 421 off alky and running it on pump gas. Right now, it has 18CC, 11-degree angle and .030 step domes. What would it take and what would I lose by doing this? 

Like usuall, uccr test and report back.

For pump gaz, you stay in the 12ish range, with 0.045" to .050 squish

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