91hatchgt

No... flat tappet heads/cam will not work on a roller block. Why don't you buy a kit for the roller block, there are a ton of them out there. Edelbrock makes one, Trick Flow makes one, Holley makes one, Ford Racing makes one, etc.....

87greyghost

because a roller kit cost about 350 dollars more and im on a budget but i guess thats how i have to go.

w8less

i dont know if i read this right.

your're converting to carb correct?

then where the trickflow kit come from? or does trickflow make carb kits?

tinman

Cylinder heads don't know what type cam is operating the valves.
You can use any type cam with the heads but flat tappet cams have to be in flat tappet blocks.........

w8less

i understand that.

i referring to the intake. i was waiting for the OP response since someone mentioned the trickflow kit

PJC Racing

Spring pressures are different between tappets and rollers.

Edit: Forgot to add: Different cam profiles require different springs. The cylinder head does know/care what type of cam, valve float at lower rpm's.

87greyghost

when he referred to the trickflow kit i dont think he saw that i was converting to a carb. I didnt understand at first either cause i went and looked for an hour for a trickflow carb kit cause i thought they might have come out with one.

67mustang302

Use a roller cam if it's a roller block. There should be an id number on the block facing towards the radiator near one of the bellhousing bolt bosses iirc. E7 = 87, F1 = 91 etc. Like mine is F1SE which is a 91 block designated for a Thunderbird Coupe. That's how you can be certain without tearing the manifold off. And yes, roller cams may require different springs, the same performance range roller cam has a more agressive ramp rate than a flat tappet, so the valve inertia is higher, you'd need stiffer springs. And be careful with heads, early/late model head switcharoos require you to pay attention to coolant passage holes, I think there are a few that don't line up.