They most definitely are on J and Ram K. J used 1.74” exhaust valves in 4-bolt heads (standard Chrysler 413 heads had 1.60” exhaust valves). Changeover to 6 bolts heads began on February 1, 1963, but so few Js were built that the factory continued with 4 bolt heads on the J. Ram K might have used J heads in the early builds, but at least later builds were 6 bolt heads, and those might have had 1.60” exhaust valves (not sure). I’m not an expert on the K; so others can correct if necessary. Carl B. J consultant From: John Nowosacki Asking for a friend- Are the casting numbers on the 413 heads for a 300 different than a non-300 engine? I think they are for the J in 63, but not sure of earlier years. -- -- For archives go to http://www.forwardlook.net/300-archive/search.htm#querylang --- You received this message because you are subscribed to the Google Groups "Chrysler 300 Club International" group. To unsubscribe from this group and stop receiving emails from it, send an email to chrysler-300-club-international+unsubscribe@xxxxxxxxxxxxxxxx. To view this discussion on the web visit https://groups.google.com/d/msgid/chrysler-300-club-international/61df3444.1c69fb81.424d4.2ae1SMTPIN_ADDED_MISSING%40gmr-mx.google.com. |
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