I bringing this back up even though there are several threads about this. 3800 sites seem to have 2 different part# for ARP rod bolts and the l32 are about 20 bucks higher. After talking with ARP today part # 123-6002 they tell me will work on all 3800 and the bolt under head is 1.7" which is what my l32 rod bolts measured. My question is why do I see so many people saying the l67 bolts wont work in the l32 vice versa. ARP say it will fit any 3.8 from 1975 to 2006?