Katech_Jason

iTrader: (19)

Well guys and gals, I'm happy to announce that the value 427 is ready and awaiting orders. Here are plenty of specs and pictures. If you have any questions let me know. We can also upgrade these with additional parts to make them more complete, or do special orders with variations. LS7 pistons are also available at an additional cost. This price is in place while supplies last. Once we are out of stock of the Cola crankshaft this short block will get a different crankshaft and the price will change.

SPECS:
Part number: KAT-A4684A
displacement: 427ci, 7.0L
bore: 4.125
stroke: 4.000
rod length: 6.100
Compression height: 1.140
Dome volume: -12cc
Compression ratio: 11.0:1 (when using a 65cc chamber), 10.5:1 (when using 70cc chamber)
Crankshaft trigger: 24x
PRICE: $6950 plus shipping
Michigan residents add 6% sales tax

PARTS USED:

Katech sleeved LS2 cylinder case
-double vacuum impregnated
-clearanced for 4.000" stroke
-decked


Cola crankshaft



Callies Compstar H-beam rods
-ARP rod bolts



Katech forged pistons



Mahle rings
1.5mm top and second, 3mm oil

Katech piston pins
.927 x 2.27 x .155

Clevite / Federal Mogul rod and main bearings

GM Crankshaft sprocket
GM Crankshaft position sensor
GM 24x crankshaft trigger









additional option pricing:


-with Katech forged LS7 pistons, hardcoat anodized
$7230


-with custom Diamond pistons and rings for nitrous
no additional charge, additional lead time of 2-4 weeks

Bink

I was so excited I almost forgot to ask....what's a "cola crank"??

Katech_Jason

iTrader: (19)

Cola is a company that is no longer in business. We have a stockpile of their crankshafts.

Ryne @ CMS

iTrader: (10)

cola makes good cranks too, from what i have seen in the gen1 small block crowd

Katech_Jason

iTrader: (19)

Yes, they have a long history

Mondello Crankshaft (Founded in 1977) > L.A. Billet Crankshaft > Cola Crankshaft

vmax1500

That's a very interesting package you put together, Jason!

Bill Reid

iTrader: (14)

Its a damn shame... AWESOME cranks... had one in my 383 (3.75/5.85) C4... a work of art as you could tell the pride behind the contruction of these cranks. One thing is for for sure... buy a cola crank as they are available and just like Callies and others... its the last crank you'll need.

Bill

LSxChevelle

iTrader: (4)

Great looking short block...making me very tempted!

vmax1500

Jason, what would a complete long block cost with LS7 heads and a cam?

Rynofasho

iTrader: (3)

Man, that is a terribly reasonable price considering the products involved. Good stuff guys!

383ss

iTrader: (14)

been waiting for this... pm on some options

firefighter

That actually is better than I thought. I figured you guys were gonna do something with the L92 block and it was gonna be the smaller bore.

What would be the optimal heads to use with the bigger bore? Or are we just gonna try and take advantage of the "unshrouding" of the valves? Or is it all LS7 stuff?

Sorry I just haven't thought this far yet.

Katech_Jason

iTrader: (19)

additional option pricing:


-with Katech forged LS7 pistons, hardcoat anodized
$7230


-with custom Diamond pistons and rings for nitrous
no additional charge, additional lead time of 2-4 weeks

Katech_Jason

iTrader: (19)

These are designed to use LS1/6 heads. We can build with LS7 pistons for use with LS7 heads upon request. The optimal LS6 heads to use would be our Katech ported LS6 heads with large 2.100 lightweight intake valves. Any LS6 head will work and we suggest a larger chamber to take advantage of the larger bore.

383ss

iTrader: (14)

can we specify cc on the pistons?

Katech_Jason

iTrader: (19)

On the custom Diamond pistons - yes.

Brabus2

Jason,

Thanks for the call this morning, you've been very helpful and informative!

I'll be in touch soon.

Cheers,
Richard

383ss

iTrader: (14)

I was wondering about the katech ls7 pistons.

TIA, sorry for all the questions!

Katech_Jason

iTrader: (19)

The Katech pistons are already made and they are -5.3. On a stock LS7 head that would be 11.2:1. If you must go with a different dish we can talk about doing a custom piston for you. We also have a 9:1 CR LS7 piston if you're thinking of going turbo/supercharged.

corvettetimmy

Katech,
Do those sleeves have a lip at the top or are they bottom registered?
Do you sell the sleeves