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#18526 08/11/2004 7:18 PM | Joined: Jul 2004 Posts: 60 Wrench Fetcher | | Wrench Fetcher Joined: Jul 2004 Posts: 60 | I know this has been asked a million times and I'm sorry to waste everyones time but, If I drop in a 350 in my '53 what needs to be changed out besides obviously new motor mounts. Can I use the original 3 speed does the diff need to be changed? thanks, Jess
1951 3100
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#18527 08/12/2004 5:14 AM | Joined: Nov 2002 Posts: 1,002 Shop Shark | | Shop Shark Joined: Nov 2002 Posts: 1,002 | I haven;t done it, but I can tell the transmission won't last past the first time you try and light the tires in second gear. The slider gear is going to come apart. I got very good at replacing the slider gear in a 64 Impala with a 300 horse 327. Essentially the same transmission as you have.
Larry
68 C20 327 daily driver
63 C20 292 Camper truck
65 C10 ? Custom Cab AC,PB,PS,$flasher
I don't own a vehicle that isn't old enough to drink.
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#18528 08/12/2004 6:39 PM | Joined: Sep 2001 Posts: 466 Shop Shark | | Shop Shark Joined: Sep 2001 Posts: 466 | Hi Jess,
The old 350 question? The short answer is it can be done and it will be a fun ride. The long answer is that it takes a lot to do it right. 350 V8 will need a better tranny. You will have to replace your torktube driveline and rearend. Then you have to think about better brakes and resove motor overheating issues if they occur. Will has done it on his PHAT52, and has replaced the front suspension also. Check out his truck sometime.
I put a 1957 283 V8 in my '55.1 with a TH350 auto tranny. I already had the open driveline rearend so I just needed a new drive shaft. I'm running stock suspention and brakes.
Later, Buddy in AK | | |
#18529 08/13/2004 4:43 PM | Joined: May 2000 Posts: 52 Member | | Member Joined: May 2000 Posts: 52 | I dropped a 350 into my 67 GMC replacing the 250 inline 6. I am still running the Saginaw 3 speed and factory 3:73 peg leg rear end without a single problem. Is this the same kind of tranny you are running?? The Saginaw 3 speed is darn near bullet proof. I have put mine to the test over and over without any hang ups. My HP rating went from 140 with the inline to just over 300 HP with this 350. | | |
#18530 08/13/2004 4:58 PM | Joined: Nov 2003 Posts: 41 Member | | Member Joined: Nov 2003 Posts: 41 | Originally posted by dubie:
I dropped a 350 into my 67 GMC replacing the 250 inline 6. I am still running the Saginaw 3 speed and factory 3:73 peg leg rear end without a single problem. Is this the same kind of tranny you are running?? The Saginaw 3 speed is darn near bullet proof. I have put mine to the test over and over without any hang ups. My HP rating went from 140 with the inline to just over 300 HP with this 350. Im doing the same thing with my '63...no problems here either.
Joe K.
1963 Chevy Stepside
350 with 3 on the tree.
1960 Chevy Bel Air
35k original miles
1991 GMC Syclone #1557
1992 GMC Typhoon #0261
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