So i am building a 455 to put in my GS 350. I know i need water pump pulley 1375146. Im sure I need the matching crank pulley, dont know the part number. Will i also need different brackets? A/C pulley? Power steering pump pulley? Thank you Steve
http://www.buickperformanceclub.com/ps.htm http://www.buickperformanceclub.com/455pulleybrkts.htm http://www.buickperformanceclub.com/MoreBuick455ACBracketInformation.htm
I had planned on using a factory type fan with fan clutch. I was told i needed a short pump for a GS, so thats what i bought, from TA Performance.
1970 Pulleys without A/C should be: Water Pump # 1375141 Crank # 1375142 1970 Pulleys with A/C should be: Water Pump # 1375146 Crank # 1375143 1971 & 72 Without A/C should be: Water Pump # 1238156 Crank # 1235779 1971 & 72 With A/C should be: Water Pump # 1235778 Crank # 1235777 71 & 72 Motors with A/C would have the LONG Shaft Water Pump Hope this helps......Jim
So the pulleys from my 350 will not work? I’m in the middle of this right now, the brackets from my 1972 GS350 seem to be compatible, the pullies aren’t lining up with a long 455 water pump. I have 455 pulleys, yes they line up with the long 455 water pump. I’ve read the brackets are interchangeable.....possibly not the 350 pulleys?
Ok im converting a 71 GS 350 with air, to 455. TA Performance told me i need a short pump, so i bought one of theirs. I have 1235778 WP pulley, and 1235777 crank pulley. The new water pump is still in the box, i can exchange it if I need to. Thanks Steve
Steve, I have the same crank pulley, the long pump lines up...short one doesn't. There is a good article about Buick water pumps on Buick Performance web site.
Ok sorry but again, I am converting a GS 350 WITH air, to a 455. I bought from TA Performance a reproduction fan shroud, and a short water pump. Is this what i need for the build? Steve
The TA 2040D? Yes, short pump. The 2040D is based on a 1970 Fan shroud. Opening is 20". Use an 18"- 7 blade clutch fan. That is what my 1970 GS455 Stage1 uses.
Steve, I just checked, I have a set of 71-72 non air cond pulleys.....looks like they would use a short water pump
Hey Jim... Clarification please: In the case of a BBB in a 1971-72 Skylark, the water should be the short shaft version. So, will the noted #1235777 crank pulley (highlighted in red font) still be the correct one? The statement regarding the "LONG Shaft Water Pump" confuses me. Thanks Jim.
Twas a copy & paste from , I believe, Todd Miller. I could be wrong, but I got it from this site. I used it to round up the non-ac pulleys for my 70 Skylark. 71 block , but the brackets and pulleys don't know that. If your looking for more information on 71s , I am not your guy, perhaps Todd, if he is indeed the origin, can help. Sorry...JIM
ALL 71 up cars used the long pump,..the 777 and 778 are the correct pullies for the long pump The 67/70 used the short pump,.the long pump didn't even exist then,...that pump used the 5143 and 5146 pullies The above is for AC and HD cooling optioned BB cars
Hmmm... Conflicting information regarding water pumps... TA Performance says short pump for '72 Skylark with a 455. So, like steverw, I purchased (and installed) a TA short water pump and reproduction fan shroud. Actually, I believe the lack of the correct crankshaft (for 455 Skylarks with A/C) is my immediate concern. Thank you for your response, JIM/DasRottweiler. Looks like I'll have to contact Tod Miller.
All the cranks are the same If that's what TA catalog says its wrong,.. If you bought the 70 repro fan shroud then for everything to work as I was intended you would need the 5143 and 5146 pullies The 778 pulley wont even go on a short pump as it hits the pump body
Hmmm... For now, anyway, my biggest concern is the crankshaft pulley. So, if what you say is true, it's going to make my quest for finding the correct crankshaft pulley much easier. Thanks for the info, hugger.
