do you over pack the void between the bearings?a littel dab will do.

i,v had good luck with the 600 650 hollys on most 335 to 375 hp 390.si, i,m thinking of trying the thunder searies elderbrock carter afb tipe carb the 650 cfm one....

3 rochester 3g's on mine...

Remove the thermostat and test it in a pan of water on the stove with a candy thermometer. Bring the temperature up slowly, stirring occasionally. If it's a 180* thermostat, it should just start to crack open at 180* and won't be fully open until around 195*.

If it checks out ok, reinstall it making sure the 'guts' side is sticking inside the manifold.

But before reinstalling it, do a sanity check and bolt everything up without the thermostat. Run the engine and see if you've got good flow thru the system. If you do, then proceed with reinstalling the thermostat.

are the head gaskets on right?or are the head gaskets leaking by and letting coolent flow in the frount insted of making the colent flow to the back of the block up through the head back to the intake. some times the gasket rots away and coolent flowes in frount of the block to the head and the block suffers from the flow being bleaded off in frount and couses overheating problems.? how old is your moter.?

The 351 Cleveland intakes have the upper radiator hose going into the top of the motor and facing down. The 351 windsor upper radiator hose plugs into the front of the intake facing toward the back of the car.

n/m

the cleavland has no water in it and the 4v has lager portes then the 2v tipe thay do not interchange....

Sound like the carb is too big for the engine and dumping raw gas into the exhaust. Also recheck your timming.

first of all what kind of a distribitor do you have?and id it the daul diagfram or single,dual point or single before modifcations?and do you still have the smog stuff on the motor?

Here are two other things that either causes or amplifies this problem:

An exhaust system that has a leak.

A vacuum leak.

Basically anytime unregulated air gets into an engine or the exhaust system it causes or amplifies the exhaust popping problem.

I had a similar problem on my 428. My exhaust headers were leaking to such an extent that I was getting blow-back. They were leaking at the head mating surface and around the down-pipes!

after 68 1/2 all 428 mustangs had the cj engine,i think that mr F or hawkrod can steer you in the right direction,they can get the dates for production for you

also check the casting number on the heads ,that will tell you if its a cj,if some one didn,t do a swap

"According to Muscle car (winter issue) of 04 these cars didn't recieve the bottom end upgrades until 12-26-68"

This is not true. Any time during the '69 model year if you ordered the optional axle ratio (3.91 or 4.30) you automatically got the cooler and SCJ internals. Ford did not start officially calling this option "drag pack" until just after the first of the year.

you have to make sure that the valve is unshrouded,have cut a very little in the chamber near the valve to optimize flow,i seen them work,with and without cutting,cut the seats to fit,and some peopledcleaned up to port area near the valves,and removed the lump in the exhaust port,becareful,it gets thin in some spots

they will work,the c 6ae r head is original to the 352i put a set on a 428 pi,worked great,still not as good as a cj head.the exhaust port floor is lowermake sure that you match your headers to the head,not the engine size,there can be a port interference and i did put the stainless cj valves in them,i call them 428 cj cheater headslow 11,s high twelves,running ford hydra cams in a 67 gt mustang 4 speed top loader,everyday driver

most watches work the same - pull the crown (the knob near the "3" on the outside of the watch) one click and turn. see what happens. my watch comes out two clicks, and when I turn it on the second click, the date changes. if not, you will have to keep turning the dial until the date changes to the correct date.
Patrick

i had to change the water pump,there is a right or left water pump lower hose intake,i believe i used a 69 pump,but that was back in 70,when i replaced a 302 with a 351 in a 68 cougar,with the larger radiator and,and used the big block rad core support

the other options are maybe your water pump is shot,you have a 4 blade fan,or bad head gaskets

ps ,i forgot fan shroud missing

Another option is to go witht he 70' water pump. i believe that in 70 the rad had offset inlet/outlets. May have to change power steering bracket though.