A few general questions about a 77'

[C10N.UT]

Hi all

I was able to acquire my friends 77 gmc he bought last year for parts.It is a 77 lwb 2wd with a 454,tilt cruise,pw/pl etc etc

I am looking into swapping as many of the "goodies" from it onto my 86'.

I am allready aware i can not use the tilt column,and was led to believe the pw/pl doors assemblies would fit with no hassles.

I was wondering if the pw/pl with the doors would actullay fit with no problems and what i might actually need to do to get them to operate properly.

I was also wondering what kinda' compression a 77' 454 would have.I was told by a local gm paarts counterman around 8:1?

I also have to figure out the drivehaft length of said setup.i was hoping that somebody would have a similiar setup/situation that had a demension that i could get the driveshaft cut to fit my 86.


any and all help would be Greatly appreciated!!!

Thanks

[mike reeh]

the power windows and locks will fit.

8:1 is pretty accurate. I can find out exactly what it should have if you really wanna know. but its about 8:1 (7.5-8.5 and 1)



what kind of transmission and rear axle do both trucks have? We need to know that to figure out if the driveshaft will work

mike

[C10N.UT]

Thanks for the response!

The 77 lwb has a 12 bolt,my 86 has a 10 bolt.I was thinging of swapping the 12 bolt in as well if need be.

The transmission in the 86 at the moment is a sm-465,the one behind the 454 is a th400.

Thanks

[mike reeh]

the th400 is much longer than the sm465... Does your sm465 truck have a 2-peice driveshaft? I bet it does.. what about the th400 truck?

mike

[C10N.UT]

The 86 gmc with the sm465 does have the 2 piece driveshaft,the 77 i believe has a 1 piece unit.