a guy at rare spares had a small block impala here, he put a 402 in and said it leaned out up top when he stompd on the loud button but was ok if easing the way up there at part throttle, reckons he fixed it by goin to a bigger fuel line because they used 2 different sizes from factory for big and smallblocks, mine doesnt do that now below 4800 and didnt do it with my 402 when i mash the loud button though and its still the same size fuel line i had with my 283 but should i do this as a precautionary measure?