Re: 67-72 BigBlock 4x4s! Pos pics info here.
 

I guess I should pay attention to what I'm typing!
The right header comes out at a 45* angle. The left side points straight down. When I was done, I had I extra 90* bend and was short 1 45.

The big block stands won't bolt onto the factory small block 4x4 crossmember without modifying them.
I used all small block mounts and cross members to bolt my big block, TH400/NP205 in. I used the forward most mounting holes in the frame (I compared a 2 wheel drive, big block truck frame to mine). Even though I moved the engine forward to the factory big block position, I had to move the trans cross member back 1". Which means the t-case shifter didn't line up in the original hole, so it got a "custom" bend.

Re: 67-72 BigBlock 4x4s! Pos pics info here.
 

Right side.

Re: 67-72 BigBlock 4x4s! Pos pics info here.
 

Trans and t-case.

Re: 67-72 BigBlock 4x4s! Pos pics info here.
 

Finally getting around to posting an update here. Got the 402 in and running. All the info in this thread was spot on. It sure is a tight fit but a little massaging on the firewall and small notch on the passenger frame rail for the header and she slid right in on the factory motor mounts. If this truck wasn't my daily driver, moving the motor forward 1.5" like suggested would definitely be the way to go but all is good like this!

Re: 67-72 BigBlock 4x4s! Pos pics info here.
 

Hey guys! I'm swapping a tired 350 out for a 396, in addition to swapping the TH350 with a TH400, all with NP205 T-cases. I got a new-to-me TH400 with a 205 already mated. From what I have researched and measured (based on my previous TH350/NP205 adapter setup vs my new TH400/NP205 setup), I'm going to add about 3" of drivetrain length due to the trans swap.

I'd like to leave my T-Case in the stock position so I don't have to cut driveshafts, move shifter hole, etc and just move the engine crossmember forward the approximate 3". I don't want to do a body lift. Do you think that would get me the adequate clearance from the firewall? Also, has anyone gotten away with this running stock-ish big block manifolds vs headers without notching the frame? Any other gotchas? Thanks a lot, great thread! Dave

Re: 67-72 BigBlock 4x4s! Pos pics info here.
 

One more to add.

http://67-72chevytrucks.com/vboard/s...d.php?t=615038

Re: 67-72 BigBlock 4x4s! Pos pics info here.
 

Well, ill add mine here.. its not detailed yet so ill only post a couple pics but I love the outcome... 1972 swb 4x4....was orig. 350 3 spd on column, now 454 with sm465 4 spd

Re: 67-72 BigBlock 4x4s! Pos pics info here.
 

Anybody know off hand if the K5 blazer frame is the same as the swb truck frame.
Body/bed mounts in the same locations?

Re: 67-72 BigBlock 4x4s! Pos pics info here.
 

They are different. The wheelbase is shorter

Re: 67-72 BigBlock 4x4s! Pos pics info here.
 

Just got my 72 Cheyenne longhorn 4x4 402 running. A quick question while I may here I have to add about a 3 inch block under the rear spring to level the truck how do I find the angle to cut it at to keep the driveshaft straight.

Re: 67-72 BigBlock 4x4s! Pos pics info here.
 

Luvinit, very nice truck. I always like to see more 4x4 swapped longhorns! On your rear block question, you need to see what your pinion angle is to determine that. You don't want it to high or low. Around 3* up should work. I can't remember what stock is but I have a HO52 in a 72 I can check.

Re: 67-72 BigBlock 4x4s! Pos pics info here.
 

Thanks for that I'll do trial and error to get it close.

Re: 67-72 BigBlock 4x4s! Pos pics info here.
 

[QUOTE=Gobuffalo;6779045]I guess I should pay attention to what I'm typing!
The right header comes out at a 45* angle. The left side points straight down. When I was done, I had I extra 90* bend and was short 1 45.

The big block stands won't bolt onto the factory small block 4x4 crossmember without modifying them.
I used all small block mounts and cross members to bolt my big block, TH400/NP205 in. I used the forward most mounting holes in the frame (I compared a 2 wheel drive, big block truck frame to mine). Even though I moved the engine forward to the factory big block position, I had to move the trans cross member back 1". Which means the t-case shifter didn't line up in the original hole, so it got a "custom" bend.[/QUOTE. Are you running a mechanical fan or electric?