g body engine swap

[Chevyman25]

I'm gonna put a bbc in a 78 2 door malibu organist a V6 car was wondering what all has to change to cram the big chevy in the car any help is appreciated

 

[ssn696]

If you have only a heater, almost nothing has to be changed. If it's an A/C car, then tall valve covers on a BBC bump into the plenum. The small brake booster clears on the other side. Just need to move the engine mounts forward, the holes will already be there. On a typical Chevy clamshell-type mount, one of the three bolt holes does not get a bolt - this is how the OEM did it. Throttle cable will be short coming from a V6, and the radiator fan shroud will need to be replaced with a V8-style, if you go that route for cooling.
Plan on some heftier springs - I have heard Moog 5660, 5662, or 5664 with a quarter coil cut off gives a good stance.
http://jeffd.50megs.com/Moog_Spring_Page.htm
Recommend new ball joints and maybe bushings if you don't know their history.

 

[Chevyman25]

If you have only a heater, almost nothing has to be changed. If it's an A/C car, then tall valve covers on a BBC bump into the plenum. The small brake booster clears on the other side. Just need to move the engine mounts forward, the holes will already be there. On a typical Chevy clamshell-type mount, one of the three bolt holes does not get a bolt - this is how the OEM did it. Throttle cable will be short coming from a V6, and the radiator fan shroud will need to be replaced with a V8-style, if you go that route for cooling.
Plan on some heftier springs - I have heard Moog 5660, 5662, or 5664 with a quarter coil cut off gives a good stance.
http://jeffd.50megs.com/Moog_Spring_Page.htm
Recommend new ball joints and maybe bushings if you don't know their history.

 

[Chevyman25]

I will be totally rebuilding the front end not taking any chances will be removing the heat and a/c plan on using solid motor mounts what headers would be best to go with

 

[565bbchevy]

I will be totally rebuilding the front end not taking any chances will be removing the heat and a/c plan on using solid motor mounts what headers would be best to go with

I have Lemons Headers on my 565 BBC but other than those I have always used Hooker Super Comp BBC in a Gbody headers which fit without issues but others have used Abody Hookers headers with only a few dents and spots to grind to make them fit.

 

[Chevyman25]

Ok awesome I sure appreciate it....how bout mother mounts besides being for a big block what is needed

 

[565bbchevy]

I have always used Moroso solid engine mounts, SBC and BBC used the same mounts
Frame mount #62630 and engine mount #62515

You can also use the upper Chevy clamshell mount with a solid factory style lower mount like ones UMI sells

Or Trans Dapt sells them as kits with both

 

[Qdub24]

http://www.maliburacing.com/bbc_conversion.htm

 

[Chevyman25]

Appreciate the info I'll look into it......how bout springs because I'm sure I'll need different ones switching from a V6 to a big block

 

[Qdub24]

Appreciate the info I'll look into it......how bout springs because I'm sure I'll need different ones switching from a V6 to a big block

Moog 5610 springs