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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
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| | | | Joined: Oct 2003 Posts: 5,152 Cruising in the Passing Lane | | Cruising in the Passing Lane Joined: Oct 2003 Posts: 5,152 | Even the performance versions of the 305 didn't make much power. If I remember correctly the heads don't breath well, which will limit the impact of any other changes.
I'd replace the cam and intake and try to create a free flowing exhaust. Any more than that, and you would probably be better off starting with a 350.
I recently saw a 290 horse crate 350 for less than $2,000. I doubt your 305 would approach that for less money.
1955 1st GMC Suburban | 1954 GMC 250 trailer puller project | 1954 GMC 250 Hydra-Matic | 1954 Chevy 3100 . 1947 Chevy COE | and more...
It's true. I really don't do anything but browse the Internet looking for trouble... | | |
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