'86 2+2 & '83 Hurst Olds

[sirplus]

I am new to the group, hello all!

My GP 2+2 Areo Coupe is very clean my project is is repowering. the LG4 just never matched the looks of the car in get up and go. What are the current trends on build up for these cars?
My goal is a very driveable, 350-400hp, I want something exotic(ls6..), but a simple 4bbl 350 just seems too logical to pass up.

 

[85t5mcss]

Welcome. And yes, u r right, the LG4 isn't a powerhouse.
Current trend seems to be Crate Engines or the LS1 Swap. Either way, u can't really go wrong. Assuming u don't care about originality or Emissions. Don't get me wrong, emissions can be retained, I did, but still don't know why.

 

[clean8485]

I am also the proud owner of a 2+2, and am not overly enthused with the LG4. I'm thinking that between the overdrive trans and 3.08 rear gears, the car could use a big cubic inch small block. When I get to that point in the work on the car, I'm thinking about either a 383 or 400 small block. I figure a combination like that will have enough torque to move the car well with the 3.08 gears, and still get reasonable fuel economy.

 

[SBCregal]

try driving a regal with a lg4 and 2.73's 🙁

 

[sirplus]

how do the late 70's Pontiac motors (400cid) work in these cars? anyone done that swap?

 

[dexter047]

how do the late 70's Pontiac motors (400cid) work in these cars? anyone done that swap?

I had a 73 400 in my 79 G.P., worked VERY well.if you get 301 mounts it is a bolt in swap pretty much. hardest part is exhaust. I have found 1 set of headers for the swap and they were expensive. Otherwise very easy.

 

[heffamphetamine]

yea it's a pretty easy swap, just be sure and get a 69 later block, other wise you'll have to get a motormount adapter kit. stock exhaust manifolds fit just fine, just make sure you get rear exit manifolds for both sides. you may want to swap the trans for a th350 or th400, i'm not sure what trans the aerocoupes had, either a 200r4 or 700r4 i guess, but those may not be able to handle the torque of a healty big cube pontiac without stronger hard parts. a th400 with a 3.08 gear would be pretty good all around. you may have to change your crossmember to use a non-od trans. be sure and get a bigger radiator and a transcooler doesn't hurt.