Haven’t been on moparts in a while. I thought I’d share an update on this thread in case anyone ever googles 270 heads and wants more info. I did share my results on a different post. I bought this short block back from my dad and built it. I ended up with this for the final combo.

511ci. Fwiw it has a 6.7 rod and a 1.12ch piston. Compression came to 11.6 to 1
The Tf heads are out of the box and checked over.
Ported Indy 400-2 intake. 1050/4150 carb
265/269 .660/.652 on 108lsa installed at 105.
1.6 rockers so net lift after lash is around .680ish
TTI 2 to 2 1/8 step headers
Dyno results were 742 horsepower and 699.9 torque.
We used a 950 carb on the dyno which was pulling about 2” vacuum From 5300 up.
2” spacer and 38 timing.
First pull with no spacer and 34 timing it made 723/680.
At 36 timing it made 736hp I forget the torque.
Hope this is helpful. I don’t have 1/4 mile times but I put it in a cuda it’s going to have a 4700 stall 9.5 dynamic converter, it has a strange Dana with 4.10s with mono leafs and cal tracks moved in 1” with 295/65 drag radials.
I’d love to see a 9.99 but I’m thinking it will be in the 10.00-10 teens. I think the race weight is going to come out to around 3650-3700.