Tubes in Slicks

[Adger Smith]

I had a set of slicks I ran on my V-6 SS Camaro with minimal runs. Goodyear does not produce them any more. (D1702)
I've sold them to a bracket racer and they work VERY well for his combination.
The problem is they are starting to loose air between rounds. Being a one man operation this is a big issue.
He runs them at a fairly high air pressure (7 1/2 to 8 1/2) for bias tires.
He has ask me about tubes.
I really don't think the extra weight would be a problem.
I've never run tubes in anything. I have no answeres for him
So, I'm here asking questions.
1.To strat with I'm wondering about the wrinkle pinching a tube.
2. I'm also thinking that it would be better to have a tube that was too small & Blown up inside the tire rather than too big and inside the tire with folds and ovelaps. (balance and pinch issues??)
3. Someone has suggested Implement tubes from the local Farmers Coop.
3.a. Why would they work?
3.b. Or won't work??
4. Could tubes hurt or help his reaction times. (footbrake racer)
These are 14 X 31.0 on a 14 wide rim. 97 1/4 roll out.
He has some 12' wide rims that could be used, but they work very good on the 14" rims.
OH! BTW: We have tried all the tricks, like Palmolive rubbed in from the inside.
Your thoughts/insights would be appreciated.