One of your pics shows oval ports.JeffB said:Carrol Shelby designed a Hi-Po exhaust manifold for small block Ford "K' code Mustangs these will fit in tight places and flow quite well,here is a pic showing the stock Mustang and the "K" codes these show up on ebay and are also available thru some Mustang shops.The second Pic is the block huggers that Speedway offers.
No,there are no SBF's with oval ports, you can Google various aftermarket heads like Canton,AFR.Trick-Flow,Edelbrock and even the Ford GT-40 (saw some today) The Header companies started this round port,oval port concept back in the 70's( I was there ) the idea was that if the flange mated up to the wider exterior of the head port they would be less prone to leakage.I remember some guys with SBC's would not buy round port headers because it freaked them out back in the day.As for the Mustang shorties working,probably not.They don't really hug the block in fact they stick out,in my '54 Ford sedan with a 302 they hit on the steering box and were up against the A-frames. :nono:This pic may give you an idea on the Hedman this a 302 in a '53 Ford car.001mustang said:One of your pics shows oval ports.
I would be careful that port shape matches heads.
All of my 289 and 351W heads have rectangular ports.
Maybe newer SBF have oval ports???