big block help - The 1947 - Present Chevrolet & GMC Truck Message Board Network

lytemup454 · 07-30-2010, 06:17 PM

Hey guys I need some help, a friend of mine just got a blazer w/ a bb. It isn't installed yet and he's wondering what it is going to take to get it in there. I don't spend a lot of time in this forum so I figured I would ask the experts.
Thanks Ian

**Yukon Jack** · 07-31-2010, 12:02 AM

Here's a great thread for you to check out.

lytemup454 · 07-31-2010, 01:35 AM

Thanks Yukon that helps a lot!

turp mcspray · 07-31-2010, 07:49 PM

If you change the transmission at the same time for a longer one, such as a 400 instead of a 350, you can move the engine forward. This will prevent having to modify the firewall, which is a lot more work as Yukon can tell you. If you add a longer trans, you can also leave the transfercase and transmission mount in the stock location, eliminating having to relocate more stuff and having to modify your driveshafts. Do a lot of research before hand, so you can decide what route you want to take, as far as modifications go. Go luck on your big block swap!

Long Roof · 08-01-2010, 12:19 PM

Quote:

Originally Posted by turp mcspray

If you change the transmission at the same time for a longer one, such as a 400 instead of a 350, you can move the engine forward. This will prevent having to modify the firewall, which is a lot more work as Yukon can tell you. If you add a longer trans, you can also leave the transfercase and transmission mount in the stock location, eliminating having to relocate more stuff and having to modify your driveshafts. Do a lot of research before hand, so you can decide what route you want to take, as far as modifications go. Go luck on your big block swap!

700r4 transmissions are also longer and you get 4 gears. If it were me I would leave the transfer case in stock location, use a 700 tranny, move the engine forward and put a spring lift on so the oil pan clears the front axle.

07-30-2010, 06:17 PM	#1
lytemup454 Registered User Join Date: Dec 2006 Location: Pueblo West Posts: 264	big block help Hey guys I need some help, a friend of mine just got a blazer w/ a bb. It isn't installed yet and he's wondering what it is going to take to get it in there. I don't spend a lot of time in this forum so I figured I would ask the experts. Thanks Ian

07-31-2010, 12:02 AM	#2
Yukon Jack Post Whore Join Date: Feb 2000 Location: Rose Hill, KS, USA Posts: 12,684	Re: big block help Here's a great thread for you to check out. __________________ 1970 Blazer with a 400 sbc and 4" lift 1980 Pontiac Trans Am, 455 Oldsmobile 2012 Kawasaki Concours 14

07-31-2010, 01:35 AM	#3
lytemup454 Registered User Join Date: Dec 2006 Location: Pueblo West Posts: 264	Re: big block help Thanks Yukon that helps a lot!

07-31-2010, 07:49 PM	#4
turp mcspray Registered User Join Date: May 2007 Location: Rapid City South Dakota Posts: 2,359	Re: big block help If you change the transmission at the same time for a longer one, such as a 400 instead of a 350, you can move the engine forward. This will prevent having to modify the firewall, which is a lot more work as Yukon can tell you. If you add a longer trans, you can also leave the transfercase and transmission mount in the stock location, eliminating having to relocate more stuff and having to modify your driveshafts. Do a lot of research before hand, so you can decide what route you want to take, as far as modifications go. Go luck on your big block swap! __________________ Turp Mcspray New life for an old 2wd, farm blazer http://67-72chevytrucks.com/vboard/s...d.php?t=505987 My Blazer build http://67-72chevytrucks.com/vboard/s...d.php?t=342299

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