well they due thru mopar as it has a mopar part number...
but they shouldn't... were gonna be on the 3rd engine for this customers car... and it hasn't left yet... were months behind cuz somebody cant do a little FREAKING quality control...
were looking into a Company called HP performance out of SoCal. they make a 4.5" bore block but has a more stock appearance... there about 500 more but it maybe worth it...