EFI fuel pumps gone bad!! Help!!

[G's Chop Shop]

I have done a couple of LS swaps for a couple of customers. The last two have been LS3 swaps. For some reason my customers after spending high dollar for their engine it seems they want to cut corners or save in other parts needed yet are still very important.

I have used the Walbro 190 for these builds and have had problems with both of them. The first one is in a 68 Camaro with the stock fuel tank and the fuel pump mounted inline with the corvette filter(no filter before the pump). This car is occasionaly dragged and it would work perfect during the whole 1/4 mile (11.80e.t.-stock motor n/a) but after crossing the line and breaking it would starve for fuel big time to a point of not moving at all. It had to be turned off and switched on and off a couple of times before it would work good again. We also started noticing that the pump started to make more and more noice. Suddenly the pump gives out which led me to believe that the pump was getting clogged up or something. So I thought it would need a filter before the pump. We contacted our provider and they gladly sent me a replacement with a new filter to install before the pump. I install the new filter and new pump and it does the same thing and now it is dead again. My customer wants a solution for this problem and so do I but I am puzzled and do not want to make him spending money without fixing the problem.

The other one is a 68 C-10 with a LS3 swap. It has an aluminum fuel tank mounted on the back between the chassis. Same fuel pump with filter before the pump and the corvette filter afterwards with a return from it. This one starves sometimes when at full throttle going straight but starve more when cornering and turning. this one did the same thing.....became more and more noisy until it died.

Using the fuel pump formula I know I only need 40 gph to feed a stock LS3.

Is the Walbro 190lph capable of handling the needs of an LS3?

I imagine there is a problem with baffling in the stock tanks but why do the pumps die?

What is the best solution for the baffling problem?

Should I go with the 255lph?