Actually lots of rolling hills here but lots of open roads to run steady speeds on. That old 305 had enough low end grunt to pull most of the grades at 70-75 mph in overdrive even with the 3.08...

For reference, tried two different HEI weight and spring combinations with the same springs. Ran the same total timing but varied the initial timing to make up for the more limited centrifical...

This is the edelbrock running with rumble mufflers.

https://youtu.be/7umnODe8nqQ

To get the edelbrock 1406 as responsive as the Q-Jet had to run the largest primary jet and thinnest metering...

I built an Edelbrock 1406 as well in the last couple of weeks and jetted it up enough to feed the 383. It ran for 7 minutes and 24 seconds with the last 20 seconds or so on one float bowl and on 4...

At one point I played with that system in an 88 Cadillac Fleetwood with a vin 9 307. That car had a 180 hp 307, 200-4r and 2.53 gears. 27 mpg but no power on hills. Was gifted a solid main 403 out...