1985 firebird 305 twin turbo

[Sbcbbcaaron]

I have most of what I need to do this however the exhaust manifolds I ordered I sent back due to not being able to fit a spark plug in it covered the hole wtf were they thinking lol so I'm looking around for another option also I decided to run 2 dif size turbos one will run off 2cyl smaller one the big one will run off the other 6 if anyone has done this and could give any advise tell me please I may have to get custom manifolds made to do it as if only seen this setup on an rx7

 

[melsg5]

I'm not sure how you think this will work. To my knowledge the RX7 is a dual rotorary engine so having a turbo on each rotor will work. The Chevy V8 has a firing order of 1,8,4,3,6,5,7,2. So what cylinders are you plumbing to which turbo and how is the turbo running on only two cylinders going to have enough exhaust gas passing through it to actually be beneficial?
Are you doing anything to beef up the internals of the 305 and what are you going to do with the cylinder heads which are not performance oriented?

 

[Zimgxp]

1,8,4,3,6,5,7,2 firing order

 

[melsg5]

thanks