ar 133 plugs

[willyj]

We have switched from methanol to race gas. On meth we used the bautolite ar133. this is a 409 gm block motown 220 irons 7200 rpm. should we stick with the same plugs or use ?

[willyj]

Hmmmm,89 views no replies. Dumb ?,ask it incorrectly? wrong location on the board.Our local machine race shop built the bottom end and we topped her off so their is not an engine builder to ask,aside from them. No one running 400 sbc with iron 220 motowns?

[sj valley dave]

We ran a 409 GM block with Dart 230 cc heads and ran AR 133 & 134 depending...Should be good to start at...