what to do 1970 chevy k20

[Chevrolet9279]

alright guys im at a point i dont know what to do.

working on this 1970 k20 i just got and i am finding all this stuff that doesnt match.

what does match:
frame
cab
tranny ( WHICH as a PTO i dont if thats good or not!)
motor

What doesnt match
rear end (corporate 14 bolt)
front end( has disc brakes)
front clip and body all excpet the cab

not sure what to do when i go get parts i dont know that to tell them
i cant say i got a 1970 K20 truck and get parts when i got differnt stuff on it.

i dont want to switch the rear end or the front end (im glad it has disc brakes) but not sure what to do... any ideas?? i think ill return it to a 1970 body but leave the front brakes and different rear end. AND the pto i wont use but kind of cool it has it.

thanks!

[Chevrolet9279]

by the way it came out with factory lockout tho.

the pics i just put up are progress!!!

[hammer502]

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[med.bronze]

I don't think I would change the front or rearends either, and I like the idea of changing the front body stuff to '70. Looks like a great project!

[vectorit]

Leave the axles, they are the least of your worries.

[OldCreek]

Those axles are upgrades...be happy about it.

When you go to the parts store tell them the front axle is....
(show us a pic to be sure) 1972+ k20 Dana44 or possible corp 10 bolt.

Rear axle is....
1973-87 K20 or C20 14 bolt (I think that's the range. You may need to show a pic of the drum to be sure.)

The safest thing to do is take in the old part with you. That way, you won't have to run back and forth and return stuff.

Sounds like you need to hang out in the 4x4 section...

And don't sweat the sheet metal stuff. You've got a good truck there!

[RPBurris]

Like old creek says above....the parts that don't match are upgrades. At least you have matching frame and cab.

[Chevrolet9279]

thanks guys! ya i think ill keep the rear endand i am happy with the upgrades i dont have to do them later!

thanks for the opinions!!

[Chevrolet9279]

Originally Posted by med.bronze

I don't think I would change the front or rearends either, and I like the idea of changing the front body stuff to '70. Looks like a great project!

thanks alot i hope it all works out good a long road ahead but it will look like a 70 when im done!!!!

[Chevrolet9279]

Originally Posted by OldCreek

Those axles are upgrades...be happy about it.

When you go to the parts store tell them the front axle is....
(show us a pic to be sure) 1972+ k20 Dana44 or possible corp 10 bolt.

Rear axle is....
1973-87 K20 or C20 14 bolt (I think that's the range. You may need to show a pic of the drum to be sure.)

The safest thing to do is take in the old part with you. That way, you won't have to run back and forth and return stuff.

Sounds like you need to hang out in the 4x4 section...

And don't sweat the sheet metal stuff. You've got a good truck there!

thanks alot! that helps me out greatly! thanks for the imput!

[Tinkermc]

don't worry be happy enjoy your new truck

[Chevrolet9279]

Thanks Tinkermc! i will!! i think im worried about figuring out what im working with but when thats over it will be great! very happy the way it is tho!

[Chevrolet9279]

Originally Posted by OldCreek

Those axles are upgrades...be happy about it.

When you go to the parts store tell them the front axle is....
(show us a pic to be sure) 1972+ k20 Dana44 or possible corp 10 bolt.

Rear axle is....
1973-87 K20 or C20 14 bolt (I think that's the range. You may need to show a pic of the drum to be sure.)

The safest thing to do is take in the old part with you. That way, you won't have to run back and forth and return stuff.

Sounds like you need to hang out in the 4x4 section...

And don't sweat the sheet metal stuff. You've got a good truck there!

ok i have a pic of the front axle and it has a hose coming out of it.. im guessing a breather...
it is 10 bolt... prob the corporate

[Chevrolet9279]

what do you guys think sand blasting or soda on the frame? i imagine i will get it done instead of doing it my self cause i think it would be more costly to get all the stuff and try to do it.

also when i go to put something on the frame im thinkin..... UNDERCOATING!!! or bed liner would be a good choice!

any opinions? thanks

[ryanroo]

Gravity!

i grew up 6 miles east of 148 and and about 2 miles south of 34

i wouldn't do any of the thick undercoating stuff. if you have it blasted, i wouldn't worry about soda for the frame. just have them use slag or whatever they recommend. i would have the frame powdercoated or use POR-15 paint.

also that front axle is from a 75-80ish K20 small hub dana 44. the rear is a 14bolt but unless the spring pads have been rewelded it came from C or K30.

Ryan

[Chevrolet9279]

Originally Posted by ryanroo

Gravity!

i grew up 6 miles east of 148 and and about 2 miles south of 34

i wouldn't do any of the thick undercoating stuff. if you have it blasted, i wouldn't worry about soda for the frame. just have them use slag or whatever they recommend. i would have the frame powdercoated or use POR-15 paint.

also that front axle is from a 75-80ish K20 small hub dana 44. the rear is a 14bolt but unless the spring pads have been rewelded it came from C or K30.

Ryan

ya i live in gravity now... i originally came from outside shenandoah ia.

i just want something that will hold up on the frame and last quiet a long time.
i know someone who does sandblasting in hopkins mo but i dont know who else does it around here i may have to do it myself and use sand, and i dont know anyone who does the powder coat or the por-15. bu thanks for the input!!!

and i was told the rear end was a corporate 14 bolt starting at 1973 and also told that front end was a corporate 10 bolt too... same year.

thanks alot!!

[TBONE1964]

You should be able to find S/N numbers and/or date codes on the top of the axle tubes. This should help you identify exactly what you are working with. The photo of the front diff looks like a dana44 to me but you really need to know the years to get correct parts. The brakes are simple but bearings and seals may be difficult since this stuff gets changed internally but looks the same. Good luck.

[Chevrolet9279]

thanks tbone! ya im tring to make sure what im working with so i can find parts in the future! since some stuff is mixed and matched!

thanks again!

[Chevrolet9279]

i agree with you guys and this is what i have come down to finding out what i got...

1970 chevy k20 cab and frame

1970 chevy 350 and 4 speed tranny WITH PTO

corporate 14 bolt rear end 1973 ish

dana 44 10 bolt front end 1973 ish

thanks for all your help!!!

[Chevrolet9279]

hey also im gonna buy the gas tank from LMC and relocate it does anyone got any pics of where it would come out? i was thinking if done right it would come out behind the licence plate like my dads 69 camaro? any thoughts or pic?

also am i going to have to but a lift on this to fit 33x12.50 tires without rubbing?

thanks

[Chevrolet9279]

Originally Posted by ryanroo

Gravity!

i grew up 6 miles east of 148 and and about 2 miles south of 34

i wouldn't do any of the thick undercoating stuff. if you have it blasted, i wouldn't worry about soda for the frame. just have them use slag or whatever they recommend. i would have the frame powdercoated or use POR-15 paint.

also that front axle is from a 75-80ish K20 small hub dana 44. the rear is a 14bolt but unless the spring pads have been rewelded it came from C or K30.

Ryan

ryan..

that por-15 looks like som real good stuff and i could do it all myself.. blasting and painting! thanks for the suggestion! i like it! prob better than undercoating what i was going to use!

[ryanroo]

No problem.

33s will most likely fit. they may rub a little depending on the sag of your front springs. but only with the wheel turned and hitting a bump i would bet. and that also depends on what you use for a wheel. the orange truck in my avatar had 33-12.5 and a 2.5" lift and there was never any threat of the tires hitting the fenders. it was on Ford 16 inch steel wheels
Ryan

[danw210]

I have the same rear diff in my 69 K20, it's a major upgrade! It is a GM corporate 14 bolt, looks like the 10.5" gear variety. The have been made from 1973 to late 90's I believe. You can get rear disc brake parts for that thing cheaper than drum parts. If you aren't concerned about all origional then I would highly recommend leaving it and adding the discs too.

[Chevrolet9279]

Originally Posted by danw210

I have the same rear diff in my 69 K20, it's a major upgrade! It is a GM corporate 14 bolt, looks like the 10.5" gear variety. The have been made from 1973 to late 90's I believe. You can get rear disc brake parts for that thing cheaper than drum parts. If you aren't concerned about all origional then I would highly recommend leaving it and adding the discs too.

Thanks! and sounds good! ya ill keep it and i will be getting disc brakes first of next year prob order them through blackbirds customs.

thanks alot! AND love the bowtie pic!

[1972RedNeck]

If your going to relocate the tank, I would use a 31 gallon tank from a newer suburban. It won't hang as low and holds more gas.