The other way to look at it is you need the cam to be its power range Before locking the converter
So for example if the cam starts making power at 2600 rpm I would use a 3000 stall .
the other factor is a cam rated for 2600 rpm will make power sooner in a 512 than a 383 so maybe 2300 rpm so a...
I have converted at least 12 cars to the factory 833 OD & I have had them in my own cars as well & don't mind them at all , 4th is 71% reduction so for 4.10 =2.91
Joe Gibbs or Brad Penn make oils designed for flat tappet engines , agricultural oils are rated SJ which is the right formula , I usually used 10-40w but the zinc/ ZDDP content is far more important than the weight of the oil used .
The combo of a 110 * LSA allows too much overlap , long tube headers will create a suction behind the exhaust leaving , in a manifold this is not possible , it will run far better with a 112* lsa or more
While not exactly hard it is expensive , the header / grille support is unique , the front fenders either need to be modified for 4 headlights or use the 71 only front fenders , the front valence is also unique as it has the front park/turn signal lights in the front valance which is unique to...
I would weld in extra support in the steering box mount then powder coat it semi gloss black , I also did mine .
Triangulate inside the steering mount .
8 PSI can over fill the carbs , you should be in the 5.5 PSi range , might need a regulator , have you checked the float height , it has to be done with the car running .