Scratch/bashing a 702

[landman]

I wasn't going to post this but why not. If you guys are bored by it, please let me know. A while back, I had inquired about the availability of the GMC B-7000.

http://www.modelcarsmag.com/forums/index.php?showtopic=96151&hl=

Turns out it looks like only this one was ever made.

So I decided to do one using a '64/65 pickup cab and the hood of a Ford N600 as a starting point. But that is still in the future. Meanwhile, I am playing at restoring a 31 Cadillac. As I was taking it apart I noticed that the V16 crankcase could make a decent base for the 702 that will be required in the B-7000, which looks like this:

Although I doubt it was ever this nice in a truck. I had gathered quite a bit of info on the 702 and used this photo of the V6 (Same block end profile) to make a pattern.

I reduced it to scale and put the V16 crankcase against it. A bit narrower, almost exactly the correct length and lower decks. So I widened it, added height to the decks, used a channel with one flange removed as filler and it fits that pattern almost exactly.

Edited October 25, 2020 by landman

[landman]

Made a front plate with sheet styrene and "heads" with rectangular strip. The closest thing I have to those valve covers are from a 409. Otherwise, they'd have to

be scratchbuilt.

The drawing shows a ridge (bolt boss) at each bore. So I marked up the bore centers and added the bosses using half-rounds strips.

Edited October 25, 2020 by landman

[Petetrucker07]

Sounds like you have plan. Lookin forward to seeing more on this.

[landman]

I recently got a pile of old engines and parts. Started looking for a suitable intake manifold.

Nothing I have would work so I tried shaping one out of plastruct.

I'm trying another approach. I reduced the picture to scale and will cut the shape out of sheet styrene then add & remove to hopefully obtain a shape.

Edited October 25, 2020 by landman

[Superpeterbilt]

This is not boring at all, its quite the opposite. To me, a scratchbuilt engine is the best feature of any model. I will be watching. I am quite intigued with this engine myself. Keep up the good work. Doesnt Frontier resins on ebay cast this cab? Im pretty sure I have one.

[1930fordpickup]

Looks good. When something like this gets in your head you have to go with it.

I guess the caddy is on hold.

[guitarsam326]

Awesome! If somebody don't make it, then scratch it, there's more than one way to skin a cat!

[landman]

Not really. They'll just have to wait their turn, that's all.

  On 4/23/2015 at 5:55 PM, 1930fordpickup said:

Looks good. When something like this gets in your head you have to go with it.

I guess the caddy is on hold.

[Tesla]

Nice work on the engine. It's looking good.

[Chuck Most]

I'll just leave this here-

http://public.fotki.com/JDURANSO/jeffs_model_cars/finished_conversion/63-gmc-b-model-hd-truck/

[mackd]

Nice work.

[landman]

  On 4/25/2015 at 11:37 PM, Chuck Most said:

I'll just leave this here-

http://public.fotki.com/JDURANSO/jeffs_model_cars/finished_conversion/63-gmc-b-model-hd-truck/

Thank you Chuck.

[gatorincebu]

Some nice work going on here.Well beyond my comfort zone. but I will be watching this one for sure.

be Well

Gator

Edited May 13, 2015 by gatorincebu

[landman]

More attempts at an intake manifold. After wrecking a perfectly good dual quad 409 Manifold, I tried to cut the outline of the image glued to sheet styrene.(that is the one on the right). Then I took another approach to building one bit by bit. (That is the one on the left). I think with some refinement, this approach may work.

Edited October 25, 2020 by landman

[kilrathy10]

What in the world could possibly be boring about this???? This is an awesome start to a potentially great project.....I don't know enough about this one to help in any way, but it sure does look like you've got a pretty good handle on it, already....Awesome job....

[landman]

JT, here's a bit more info. The 702 was the biggest gas engine available at the time in GMC trucks.

There is a company which specializes in restoring them to suit various applications. They are the ones who kindly gave me the measurements.Here's their website. there is quite a bit of info about the 702 there.

http://www.thunderv12.com/

The B-7000 I am hoping to replicate, was a float tractor used by the company I worked for. It had a deck and a winch sort of like this one. I can't remember whether it had gin poles but I think it did. I've been trying to find photos of it but most of the guys who drove them have kicked the bucket and I don't know their family.

 

Edited October 25, 2020 by landman

[Mopar - D]

Pat another awesome project you have here. I will be following along.

[mustang1989]

This is wicked!!!!!!!

[Bennyg]

Nice project.

Ben

[landman]

You'd be surprised by the amount of time I put on these intake manifolds so far and I am far from done. But here's where I am.

Edited October 25, 2020 by landman

[mustang1989]

Lookin' good Pat!!!!!!!

[Tesla]

Pat, the manifolds look great. Thanks for sharing all the info you've compiled so far about this engine.

[landman]

The intake manifolds are almost there.

Started on the exhaust manifolds. Glued some Plastruct together. Rounded the ends one way, then the other.

Started a strip of half round to make the ridge.

Looks like the real thing....

Until you put it on the engine. It's way too big. Look at the picture at the beginning, you'll see what I mean.Have to start again with smaller material. Chalk this one up to experience.

Edited October 25, 2020 by landman

[landman]

Made another one with smaller stock. It still looks "chunky" compared to the real thing. I've been using 1/8 square rod, perhaps 3/32 maight be more like it.

The other three are well on the way.

Edited October 25, 2020 by landman

[Superpeterbilt]

Lookin good