Posted by Vaughn [172.70.211.166] on Monday, December 29, 2025 at 18:57:38 :
In Reply to: Re: Firewall to radiator distance posted by Greg Coffin [172.68.35.143] on Monday, December 29, 2025 at 12:55:53 :
There are two pumps, the aluminum with the correct inlet on the right side and cast iron with the inlet on the left side. The long pump required shortening the shaft and housing, the iron short pump requires relocating the outlet to the left side. The attached file is the mods Helitool used to make the aluminum pump work. If you have the skills and equipment a person can do the work themselves, else a machinist is required. Although members have mentioned about a pump being available off shelf, I have yet to see one or been able to find one. So if the pump is the long one used, you are probably not going to be able to use a fan on the pump.
Because of Mopar's "thin wall technology on the LA engine, here is what Helitool has to say, "If your V8 has not been bored more than .030" oversize and your radiator is in good condition your engine should run the same temperature as its thermostat. I would suggest starting with a 170 deg. Our most recent conversion ran for hours in 107 deg. weather with a 160 thermostat and never got over 175 deg. So if you have overheating problems it is probably your radiator that is at fault. Don't install the fan shroud unless you really need it, it's a pain to work around." Although radiator has something to play if your engine is running warm, the shroud makes the difference in keeping it cool.