Wondering if anyone has run this setup and how it performs.

I have a '66 with the 352 with stock manifolds and dual exhaust. It has a 2 barrel that is almost stock.

I'm thinking of maybe running a 2 barrel from a '69 Torino or a '67 Galaxie 500 for the larger bore size, going to shorty headers and sticking with a dual exhaust. Would this open up any potential in the engine or is it all hot air and pipe dreams?


I'd like to open up getting off the line a little better, but we also have 75 mph speed limits here and still need to run on the highway at a decent clip.

 

You should see some gain but in my opinion it will be from the headers.

I do know you will have a instant gain by adding an intake and a 4bbl, even with the present iron manifolds. It's actually shocking how well a 352 will respond going to a 4bbl.
The Edelbrock performer intake or even a stock iron 4bbl intake, Holley 1850 600cfm or appropriate Autolite 4100 will really wake it up, even with iron exhausts.

 

You didn't specify which truck you have, which transmission, and which rear axle ratio. From your other post I see you have an F-250. I assume 4 x 2? So your axle ratio should be either 4.10 or 4.56 if it is OE. A ratio like that should get you moving from rest pretty sharpish if everything else is well. It's my understanding that LONG tube headers are better for low end torque. Certainly the OE log manifolds are a bottleneck. I'm pretty sure that your good old Colorado altitude is causing some of your underperformance so maybe carb tuning can improve things. If you want to cruise on the interstate at 75, you may need to drop down to a 3.54 ratio, but those are getting a little difficult to find. Good luck!

 

Yep, a F250 4x2. Not sure about the axle ratio. I must have a little larger than stock tire size as my speedo is off about 5-8mph depending on the speed. I cruise not too bad at 75 now. Just looking to open up any power that might be there if there's some to be gained with a slightly larger 2BBL from the Torino and maybe with the combination of the short tube headers and a new exhaust. I'm leaning away from headers in general and now trying to decide if that carb would help any.