AR vs. Vicks vs. Allison Headers

[justrhines]

Hi All,

Just finished installing and tuning up a pair of IDF's on my '75 1800. Sure sounds great- but sitting at about a 12 sec 0-60, in part due to my lack of flow downstream of the block. Wondering if any of you have experience with the above-listed 4-2-1 headers (or any other brand) and could recommend a set.

Thanks,
Justin