my 15 year old son and I are re- building a 1979
Chevy PU for his first vehicle.  we swapped the old 6 banger for a 305.... 

it needs a carb,  any suggestions.....


phone

id slap an edelbrock performer 500 on it and be done.  CFM wise on a 305 with a generous 85% VE and a 5k rpm max range puts you under 500. 

plus edelbrocks site says "500 for a small v8 like a 305" it wont cost an arm and a leg either like a holley/demon.

http://www.edelbrock.com/automotive_new/mc/carbs_acc/performer.shtml

I am a fan of the Q-jet carbs.  It's likely going to give you the best cruising mileage and decent performance under full throttle conditions.  A common problem with many of the Rochester carbs was wear in the throttle shaft/bast plate causing vacuum leaks.  If everything feels tight and there aren't  any other issues with the carb you have, I'd suggest having it rebuilt by a qualified shop or look into the new ones available from Edelbrock.

I have a edelbrock 750 with electric choke I need to get rid of.


RoB~SoCalJetBoats~

I appreciate the offer, but a 750 is too much for for the 305.....


phone

. No problem.


RoB~SoCalJetBoats~

Damn...

I just sold a 600 cfm TBI system that would have been the bomb diggity.

I would totally keep the Q-jet. You can squeak some silly mileage out of one of those with a little knowhow.

Under the carb top near the rear there is a really small spring with an adjustment screw that controls ths secondary air door, this has a spec and should be adjusted before putting on the truck. If you adjust it a tiny but tight than the instructions tell you, it will hold out the secondaries a little longer than normal. I drove a 1976 LS7 powered 3/4 ton 4x4, lifted with 38" Swampers back and fourth from Gilroy to Sacramento for almost 5 months for a job. The stupid thing thought it was a Toyota. I got 18mpg out of it.

GT

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