12A vs 13B weight

Rogue_Wulff · 07-20-2009, 11:20 AM

Is there any real difference between an 83-85 12A and 84/85 6P 13B, when it comes to weight? Near as I can figure, they should be within 10-15 LBS of each other, with the 13B having slightly more metal.
I've got an '83 GS with a 12A/5 spd, and the engine is having oil consumption/smoking issues, but runs fine otherwise. The car is in rather nice shape, aside from the smokey exhaust. The 12A has been rebuilt at some point, and still makes good compression, but it had the beehive oil heater on it (now has FMOC).
I also have an '84 GSL-SE that has a good engine, converted to carb with the RB intake and edelbrock 600. But, the interior is in bad need of attention, as well as the paint and windshield. Likely needs suspension work too.
I'm thinking about swapping the SE engine/trans into the GS, so I can continue to drive it, until I can freshen up the 12A. Although, I could build a 1/2 BP or full BP 12A, and use the SE chassis as a track car. Or, swap in a TII engine/trans.......
Near as I figure, the SE engine/trans would be a bolt-in swap, aside from the engine mount bar. Both cars have RB headers, so even that would be a simple swap. If I really wanted to get fancy, I guess I could swap the front crossmembers, eliminating the mount bar mods required to install the non-stock engine.
I'm figuring the extra HP/TQ of the 13B would be way more than enough to offset the minor increase in weight, especially since the swap would actually be legal in CSP, where I've run the GS for several years, and it has most of the suspension mods needed to be competitive in the class.

07-20-2009, 11:20 AM	#1
Rogue_Wulff Non Member Join Date: Jun 2008 Posts: 310 Rep Power: 18	12A vs 13B weight Is there any real difference between an 83-85 12A and 84/85 6P 13B, when it comes to weight? Near as I can figure, they should be within 10-15 LBS of each other, with the 13B having slightly more metal. I've got an '83 GS with a 12A/5 spd, and the engine is having oil consumption/smoking issues, but runs fine otherwise. The car is in rather nice shape, aside from the smokey exhaust. The 12A has been rebuilt at some point, and still makes good compression, but it had the beehive oil heater on it (now has FMOC). I also have an '84 GSL-SE that has a good engine, converted to carb with the RB intake and edelbrock 600. But, the interior is in bad need of attention, as well as the paint and windshield. Likely needs suspension work too. I'm thinking about swapping the SE engine/trans into the GS, so I can continue to drive it, until I can freshen up the 12A. Although, I could build a 1/2 BP or full BP 12A, and use the SE chassis as a track car. Or, swap in a TII engine/trans....... Near as I figure, the SE engine/trans would be a bolt-in swap, aside from the engine mount bar. Both cars have RB headers, so even that would be a simple swap. If I really wanted to get fancy, I guess I could swap the front crossmembers, eliminating the mount bar mods required to install the non-stock engine. I'm figuring the extra HP/TQ of the 13B would be way more than enough to offset the minor increase in weight, especially since the swap would actually be legal in CSP, where I've run the GS for several years, and it has most of the suspension mods needed to be competitive in the class.