I have a similiar combo also

400 block
Source kit 511 kit -24cc dish
.005 positive deck / .050 gasket
Standard port Indy SR (ported my MCH)
SFT 260/266 (Dwayne’s cam)

I haven’t ran a modern single plane on it yet,
Cleaned up TM6 with a 4150/1050 anular 10.92 @ 123.4
Cleaned up six pack 10.95 @ 122.9 ( runs identical to the tm6)

69 RoadRunner
Car is 3760 + my 250 puts it at 4000#
4.10 gear and 9.5” converter
3” tti exhaust

Drive it every where including to the track. It’s just a fun low maint combo.

Like said above, buy good 1.6 rockers like Harland’s. 1000+ cfm carb