Thread: Head gasket thickness on a 390

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Thanks Guys
I'm ordering the .20 shims from Summit. I just didn't know what to order. they should be here by Friday and I can assemble the engine this weekend. (Another satisfied customer).
I might as well get some more info while I'v got the experts listining. I'm wondering what H.P. I will be running.
I've got a 361 truck block boared to 4.11 this gives me 402 ci with a 390 crank and rods out of a 1963 390, forged flattop pistons,Comp cams 268 cam. I'll run a aluminuim high rise and a 750 holly. Headers and electric fan on the radiator. I'm running what is called four barrell heads off of a 1963 galaxie 500 390. To start with I'll be running the stock points dist and electronic later on all this and a c-6 which I'm hunting for will go in a 66 fairlane.
Can anyone make a wild guess on the rear wheel H.P. Lets hear from the FE experts please .
Thanks for the help and info guys.
Route 66

I plugged the numbers into my hp calculator program and your looking at about 350 to 360 horsepower with around 400 to 410 ft lbs of torque. Assumming the weight of the Fairlane at around 3500 lbs that will put you down the track at around a 12.7 @ 108. If your car weighs more obviously it will go slower. I think that with that big C6 you'll be running very low 13's consistantly. I would suggest running regular Felpro head gaskets. Your not talking about an 800 horsepower engine in which you would need to get every last bit of power out of the engine by concerning yourself with that last ounce of compression. I'm sure that you want this engine to be reliable as well a fast so stick with the good Felpro's. I'm sure you don't want to be changing head gaskets in that tight Fairlane engine compartment. Good luck.

I'd go with the fel pro, I think they compress to .040. I ran them on my 390
back in the day whern they first started putting the o,ring of a sort in them.
In the mid 70's my 390 ran 12:71 @ 105 in a 4000 lbs 57 Ranchero. Not once,
everytime you raced it. Hell of a bracket car at that time. A .060 over 62
block w 6090C heads, Lowriser rods, 2X4 lowrise intake/w 2 500 cfm carter
comp series carbs, Malory points type Distr, and good headers. A FOMOCO
500-324 cam. 10 in converter. Really basic stuff
good luck, Ron BTW, a 10X28 Tire