Nothing wrong with old, but why do you think you need to go to a 2800? If its tuned as good as you say the 49 should spool just fine with a stock converter, if u have stock cam its small makes power at low rpms so in theory moving stall speed up your loosing part of your power band..
If you do go higher on the stall maybe consider a 10.5" or 10" as opposed to restalling the stocker so at least you'll save some weight at the same time, think its around a ten pound difference.
Wow , In the 11's with only valve spring upgrade , That is impressive
a strong 49 running combo will 60ft in 1.5/1.6 range,run low7 in the 1/8 at 95+mph,115 to 118mph in 1/4 with an et of mid to low 11s.i don't see a built trans in your sig,running 11s you will need one.
i ran a 49 turbo into the 10s on 3200 10.5 protorque single disk lockup.the 2800 12 restall is a good idea as long as he doesn't blow through it and can lock it down,the stock motors need it tight.
Not saying anything wrong with restalling a d5 just giving him something to think about..killing 2 birds with 1 stone raise stall & reduce weight. I'll always defer to someone with more experience but sometimes the little things are easy to forget.
This will show my ignorance but when you sat " restall " the stock D5 , Does that mean removing it and having a converter place open it up and chage the fins so it will then have stall ?
Its been hot here in the south but maybe late this month
