Hey consider that its pretty common for a 302 with good heads and a decent roller cam to make 350 to 375 horse.I have a book called "Building Ford Short Track Power",and in this book they cover a junk yard 5.0 short block with good heads and intake make between 375 and 390+ horsepower with no exotic parts or machine work.393 from a 289 is possible ,but realistically its probally a little less than that.More like 350?

55 fairlane gasser 312 /c4, 57 f100 292/c4, 52 mainline gasser 302/t10 4speed

Yes, I check in there about once a week.  There is a lot of good info and smart guys on the 2100/4100 series carbs.  Recently a great tip was given on an inexpensive source of Autolite jets.  Picked up 5 sets .

Mike

Mike, located in the Siskiyou mountains, Southern, OR 292 powered 1946 Ford 1/2 ton, '62 Mercury Meteor, '55 Country Squire (parting out), '64 Falcon, '54 Ford 600 tractor.

you must have been on Eds forum. and its 393 H.P.

Kenny  Onalaska, Texas

Hope this poll works, and if not that I can delete it .

Mike, located in the Siskiyou mountains, Southern, OR 292 powered 1946 Ford 1/2 ton, '62 Mercury Meteor, '55 Country Squire (parting out), '64 Falcon, '54 Ford 600 tractor.