HEI on a 1968 250 I6... Weights?
 

So I am trying to chase some driveability issues I am having.

Purchased the truck a few months ago. Carb was leaking and I rebuilt it with new gaskets and a brass float. I may have been pretty passive driving it before the carb rebuild. After the rebuild I tried adjusting the timing too - basically checking everything is in order...

So now I have no leak, but the truck seems to stumble a bit when you floor it.

So far I have replaced;
spark plugs
plug wires
distributor
rotor
fuel filters
fuel pump
air filter....

I am left with the distributor weights/module/coil, and the fuel supply in general.

Can anyone confirm the weights on their HEI's?

"452" is on the center section
"106" is on the centrifugal weights

Can I check the springs? or are they standard?

http://i14.photobucket.com/albums/a3...psv5ltutxa.jpg

Tomorrow I figure I am going to buy some fuel line and put a temporary fuel supply (jerry can) straight to the pump - by the battery and go for a drive.

Comments? what weights should be there? What can I do to verify the weights and advance?

I adjusted the carb fuel mixture using a vacuum gage. It seems to pull about 18ish inches of mercury. The vacuum actuator seems to work fine on the distributor (pulled vac with a pump).

Re: HEI on a 1968 250 I6... Weights?
 

Is there an advance curve with regard to RPM? Something I can check the distributor function with regard to?

Re: HEI on a 1968 250 I6... Weights?
 

Just learned the vac advance diaphram is stamped with the Vac advance = 20 degrees.

Re: HEI on a 1968 250 I6... Weights?
 

I've always just left the HEIs with the weights they came with, until I came across this in some thread on this site. I haven't tried it, but I want to someday: