If it's a flat top, it is.
> Anyone know what piston cast #1557148 crosses over to part number wise?
> The number is in a 289 V8. I am trying to determine if it is an R1
> piston.

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Michael - Roseland FL - 27 Aug 2006 02:59 GMT
It is a flat top. Since I posted the question, I found the R1 pistons
that came out of my R1 Avanti engine and they share the same casting #.
> If it's a flat top, it is.
>
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