I Currently have Dougs on my 414 stroker in my '74 Duster, but they aren't letting it live up to it's full potential. It's doing 7.17 in the 1/8th right now, but I'm sure it can get better. The heads flow 300 (verified by 2 reputable shops) with 2.055/1.65 valves. Cam has 257*@.050 and just over .600 net lift at the valve. The exhaust ports on the heads are larger than the header tubes, so I KNOW the headers are a restriction (1-5/8 tubes). So now I'm considering some bigger headers. A couple of people have told me not to get the TTi 1-3/4. I'm looking at either the 1-7/8 TTi's, or the Hedman Hustlers. The hedmans have straight 1-7/8, or 1-7/8 stepped to 2". So should I get:

1) TTi 1-7/8 (non step)
2) Hedman 1-7/8 (non step)
3) Hedman 1-7/8 to 2" step
4) Other.

Not a big difference in price between the Hedmans and TTi's.

Thanks,
Dave