MustangWorks.com : Ford Forums - View Single Post - upper plenum swaps on comparable ci engines?

87saleen · 02-21-2003, 09:53 PM

i have a stock 87 upper ho and a stock 87 upper which was extrude honed. the cast dates are within 3 months of each other and the part #s are identical. there are minor exterior differences, (other than no ho on neck) but i have been told that before it was ported the non ho unit had a smaller diameter front port. i dont know what junk yard vehicle it was taken from, but it is clean.

02-21-2003, 09:53 PM	#2
87saleen Registered Member Join Date: Feb 2002 Location: boulder city, nv Posts: 6	i have a stock 87 upper ho and a stock 87 upper which was extrude honed. the cast dates are within 3 months of each other and the part #s are identical. there are minor exterior differences, (other than no ho on neck) but i have been told that before it was ported the non ho unit had a smaller diameter front port. i dont know what junk yard vehicle it was taken from, but it is clean.