arp rod bolts and some spare engines

tearing down my engine and was missing the oil sling for the lower gear on timing gear
I was reding the slant six book and realized I didn't have one , I have 2 spares so looked at one and not there but one had it, yeah!. also someone put the front crank seal in the wrong way , it must a have leaked plenty. so I was fitting my arp rod bolts and did not fit.
I call arp tech and they stopped production cause they don't fit!!!, any way going to machine them a bit so they go in , maybe Im later models they reconfigured the rod ???
I have my original head and a newer peanut model side by side , the chambers look pretty identical so im going keep my head like it is . enjoy some pics

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