This might sound strange, but I am looking to slightly improve the 307 that is in my 70 Chevelle.
The camshafts in these engines are known to have high wear causing lower performance and high fuel consumption and likely needing replacing by 50,000 miles. My car has these issues at its current 37,000 original miles.
I'm thinking about 305 heads for a compression increase and a cam that has good idle and makes decent torque. I already dumped the two barrel carb and iron intake for a 600 cfm spread-bore Holley on an Edlebrock Performer alum intake.
I know, I know, upgrade to a 350, but the car is a low mileage "family heirloom" with a Powerglide and 3.00 (I think ) rear gears. I just want to make it drive a little better and on a budget.
Any thoughts from the 305 gurus?
Rob Liebbe
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