The US Grant/Lees were a god send for the British 8th Army. Despite being stop gap designs they packed a 75 mm gun while most British built tanks still had the small 2 pounder. Besides better anti-tank penetration the 75 MM could fire a HE round to knock out Rommel’s 88 MM position something the 2 pounder could not do.
By the time a Grant/lee could be in range to knock out an 88, it’d be a blazing tin can, unless the 88 crew was comprised of Helen Keller, Ray Charles and Stevie Wonder.