Wich Box Upper??
 

Wich (if any) 5.0 box uppers will fit a 351 truck lower?? I'm trying to get my blown 351 pwrd GT on the road, but I'm saving for a Trick Flow. I have a truck lower, wich ones can i choose from? ie- GT-40, Stock 5.0? Any help would be great as I will be buying one used and will not be able to return once I buy one.

I know that Competition Cams offers a "comp composite" box upper that will fit i think stock 5.0/5.8L style intake manifolds. I'm not sure if the runners are the same size between the stock 5.0L and 5.8L manifolds. You could probably contact them and ask.

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'84 Mustang 5.0 LX
my LX
'89 Mustang GT
my GT