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I have a 1990 F250 extended cab long bed w/ 351w and am in the process of rebuilding an engine. I want to upgrade the heads was thinking of World products Dart Jr. Was wondering if this would hurt my low end performance. I tow a 9000# car trailer with it and need all the torque I can get with this small block.
I've told that the windsor is so "Head" restricted that any aftermarket cylinder head(not race head) would pick-up performance, both HP and torque throughout the rpm range. I am using the stock cam and speed density.
Thanks