E-street vs Promaxx vs 440 Source

PRH said

That’s often the situation these days.

Of course.......based off what 318w was proposing earlier..... the 452’s might end up as the cheapest option for him....... if low cost is high on the priority list.

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For anyone who has had experience with any (all) or some of these heads, are the advertised chambers close to what is listed ?? As in E- street 75cc and the others 80-4 cc. For those interested in trying to manage compression with out positive deck pistons. You can only surface a reasonable amount. Thanks Swingn’.