302?
FTE Legend
Joined: Jun 2006
Posts: 31,930
Likes: 1,499
From: Ottawa, Ontario
As much as you have money for. I know that's not the answer you wanted but it depends what you start with and how much you spend to build it up. A factory iron block will only support about 450hp before keeping the head gaskets sealed becomes an issue. And making that kind of power reliably for thousands of miles is a lot more expensive than making it for 1 trip down the track. You could strap some big AFR heads on a 5.0, plug in a cam that makes power out to 8000rpm and get well over 400hp, but it's won't work too well in a big ole truck, so what's the point.
Super Moderator
Joined: Apr 2004
Posts: 34,517
Likes: 2,826
Some of it was gone over here:
https://www.ford-trucks.com/forums/716787-302.html
Including a link to another thread about a 530 hp 331 in Hot Rod....
https://www.ford-trucks.com/forums/716787-302.html
Including a link to another thread about a 530 hp 331 in Hot Rod....
Senior User
Joined: Mar 2005
Posts: 341
Likes: 0
From: Newark
My mustang has a well built balanced stock bottom with forged piston 306 and AFR heads N/A. I put est. hp at 390 at the wheels. About 425 at the motor. Shifting at 6900 with a 5 speed. These 5.0.s can take some serious power. Get a main support if you do build up the motor. All said and done I put about $6000 into the motor but it has lasted over 6 years of hard 11 second passes and weekend street use.
