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#68404 11/09/2006 9:07 PM | Joined: Jan 2006 Posts: 205 Shop Shark | | Shop Shark Joined: Jan 2006 Posts: 205 | OK I have a small block chevy. Need to know if I need a short shaft or long shaft water pump. This is going in my 48 1/2 ton 3100.
Also what is the best source for a great radiator.
Tom
48 Chevy 3100 Shortbox 5 window
"The Big Dog"
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#68405 11/09/2006 9:57 PM | Joined: Jul 2006 Posts: 232 New Guy | | New Guy Joined: Jul 2006 Posts: 232 | Several things to consider.
1. How much room between the front of the engine to the radiator?
2. Do you already have brackets for the motor to mount accesories? if so for long or short pump.
3. Electric fan or belt driven?
I went with a long pump on my 39 but I set the motor back as far as I could. Only about 1/2 inch between distributor and firewall. I also had to run different valve covers than I was originally going too.
As far as a radiator I had mine built by PRC, it was about $500 but it is a great product. No cooling issues at all and Im running a mechanical fan with no shroud. | | |
#68406 11/10/2006 1:53 AM | Joined: Apr 2005 Posts: 2,832 'Bolter | | 'Bolter Joined: Apr 2005 Posts: 2,832 | Short pump, always. Never heard a swapper say, "darn, this engine is too short". One drawback is that the last short pumps in cars were in 1968 and 1972 in trucks. This means you usually have to buy new (repro) brackets and they can be pricey. Still it's a lot easier to use spacers and fan shroud that to modify a space to take something too long.
Evan
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#68407 11/10/2006 7:44 PM | Joined: Dec 2003 Posts: 299 Wrench Fetcher | | Wrench Fetcher Joined: Dec 2003 Posts: 299 | I have clearance for a long pump but I'm going to change over to a short pump .I like the idea of more clearance. | | |
#68408 11/11/2006 5:34 AM | Joined: Jan 2006 Posts: 205 Shop Shark | | Shop Shark Joined: Jan 2006 Posts: 205 | I agree on the short pump How much differance is there?
Tom
48 Chevy 3100 Shortbox 5 window
"The Big Dog"
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#68409 11/15/2006 1:20 AM | Joined: Oct 2006 Posts: 40 New Guy | | New Guy Joined: Oct 2006 Posts: 40 | I went with the "short" pump on my SBC swap & I went to
a elect. pull fan because it is somewhat "crampted" under
the hood, I went with an Amer. Radiator HD unit. (I had some
over heating problems & this cleared things up for me !)
Make sure you use a good aftermarket mount, both front
& rear, they are cheap & make things quite easy for you !
See either Classic Parts (# 79-405 for $55 (or Brothers ).
Here is your problem if you set the engine to far back (with
a longer pump) is getting the dist. in & out !
'53 GMC "Ranger"
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