GMC-IH

[dragstews]

Progress did ya say .. ?

You must be registered for see images attach

 

[CountKrunk]

What am i looking at?

 

[dragstews]

What am i looking at?

Had the need to know the combustion chamber volume so I could order pistons that would allow for 9.5 to 1 compression ..
This motor will be 496 ci (.060" overbored & .250" more stroke (4.250") than a stock 454 .. Netting 42 more cubies ...

You must be registered for see images attach

Dome pistons having 12 cc to the positive will do the trick ...
Shooting for .040" quench ..

 

[dragstews]

You must be registered for see images attach

Left nut for a CK-10... No, wait ... Yeah, definitely the left one ..

 

[dragstews]

Gen VI motor is on a stand and in the shop ..
Doing a tear down and a clean up for inspection of what's to see ..

You must be registered for see images attach

I don't have a need for this motor, it'll most likely be up for sale ...

 

[dragstews]

Will have the Gen VII (496 cid) on a stand tomorrow .. It too will be took apart for a look-see and clean up ..

I really should be building this one for my truck ... Already sporting 496 cubes .. Could revert back to a carb and a HEI ignition with using a Dart intake ...

You must be registered for see images attach

This puppy ain't cheap ...

Since my Daddy isn't Bill Gates, I'll be sticking to building a Mark IV 454 ..

 

[dragstews]

It's just a wee bit of Hot-Rodding ...

You must be registered for see images attach

And a bunch of work ..

 

[dragstews]

You must be registered for see images attach

Not all that sure what I'll do with these two, last of the Big Blocks, engines ...

Wanting to take them apart to see if they're buildable, but it's so dang hot it's hard to stay in the shop ...

 

[CountKrunk]

Feel ya there. Doors all closed up my shop hit 102 yesterday.

I think we're going to install some exhaust fans, as we want a barn cat in there.

 

[dragstews]

You must be registered for see images attach

More parts for the 496" motor build ..
The 62 C-10 going to looks pretty nice under the hood ..

You must be registered for see images attach

Well, it's a start ..

 

[dragstews]

.0005" away from finish size of bore on the stroker 496" ...

You must be registered for see images attach

Had to order 400 grit stones to do the .0005" ...

Been slightly busy on my 781 heads getting the work done installing the oversize valves ..
Since they was so huge I had to buy more tooling ..

You must be registered for see images attach

You must be registered for see images attach

Close to having one done, still got the port runners to contend with ..
This work is slow go cause it's very time consuming ...

 

[dragstews]

You must be registered for see images attach

You must be registered for see images attach

Got the chamber work done, now to do 7 more just like this one ..

You must be registered for see images attach

You must be registered for see images attach

Not yet .. !!
Cylinder bore notching is yet to get done too ..

xc_hide_links_from_guests_guests_error_hide_media

 

[dragstews]

Sold my bare 4-bolt block in order to buy tools to work the 781 heads ..
Really didn't want to do that but I'll find another Mark IV down the road ...

Got another 4 bolt main block nailed down. .. Wasn't very far down the road.
Tomorrow I'll go after it ..

You must be registered for see images attach

Guessing I looked at about 30 blocks before I found this one ...
Soon to see what I bought ??

You must be registered for see images attach

It's in the bed of the truck and in route to my shop ...

You must be registered for see images attach

Looks to be a good, unmolested last year for the Mark IV Big Blocks ..

 

[dragstews]

I got an idea ...

You must be registered for see images attach

I'm thinking of selling my 2 bolt main 88 motorhome motor .. Going to use a set of heads off of a Gen VI on it ..
( The late model heads are a huge plus cause they up the compression (100cc chamber opposed to 118cc) and flow much better than the peanut port heads that the motor had from the factory )

If I can get $2,500 for it I'll be able to buy the stroker kit for building the 4 bolt main block I just got into a 496" ..

Any takers ??

xc_hide_links_from_guests_guests_error_hide_media

 

[dragstews]

The herd is growing ..

You must be registered for see images attach

The Mark IV 454 is in grand buildable shape ..

You must be registered for see images attach