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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!
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| | | Joined: Sep 2011 Posts: 50 Wrench Fetcher | | Wrench Fetcher Joined: Sep 2011 Posts: 50 | how much room do you need between the front of the fan pully itself , and the radiator , or how much space should be left between the fan and radiator , i'm working with very tight quarters , as small as the 305 looks compaired to that big old long 6 cylinder , you'd think you'd have plenty of room , but it's just gonna fit in there ! | | | | | Joined: Feb 2000 Posts: 5,201 'Bolter | | 'Bolter Joined: Feb 2000 Posts: 5,201 | With good motor mounts and front to back engine support, 1/2" fan to radiator will be enough.
Joe | | | | | Joined: Apr 2005 Posts: 2,832 'Bolter | | 'Bolter Joined: Apr 2005 Posts: 2,832 | There should be room to spare if you are using the small distributor and short waterpump and brackets. If not, you have created your own problem but one answer to your question is 3/8" is enough clearence with a rigid fan, and marginal for a flex fan. Less than that and fan belt changes are a challenge. With close clearence good motor mounts are a must. Short pump setups were used on cars through 1968 and trucks through 1972. All the after market suppliers offer them because most of the earlier cars, 20's-40's, must have them for clearence.
Evan
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