14102193... I looked at 3 diferent sites and they say it has 1.94 and 1.5 valves, and that they're EFI 350 heads.. i know i need to elongate the middle bolt holes to work with my intake, but are these heads worth the time to swap them? my motor has 2 different heads on it now, and they're such diferent castings, that I'm afraid of the consequences of leaving them on much longer. any thoughts? they came off of a roller one-piece block, and I'm thinking they're truck heads. thanks for the help, guys.

 

Hey Josh, avoid those heads if you can. Those are 350 TBI swirly-crap heads.

Try to find some 305 carb heads like the 416's or 601's. Those have the standard straight bolts on all sides. If you can't afford the compression, L98 heads or the 083 castings will suffice, however, like the 193's, they have the angled center bolts.

 

I have a set of 416's..... I'm running 10-1 flat tops in the motor now. ( i'm assuiming 10-1 with 74 CC chambers.... ) am I still going to be able to run pump gas with the 58 cc chamers?

 

Dont assume a 10:1 until you measure the deck height of the block. A standard rebuilder piston sits an extra .020 in the hole. On a stock deck height block that makes a .045 deck (give or take). If you are really at 10:1 with 74s, you dont want to use a standard 58cc head. One thing to remember though is that when you cut the 58cc heads for bigger valves, and unshroud them, you will gain some chamber size. Probably to 62 or so CC. My heads started as 60CC and ended up at 64.5. That will help some. Have the heads CC'd when you get the new valves, and if you need to, work the chambers to increase the chamber volume. just be careful spending too much money on those Budget 305 heads. You may find that you can buy a set of cheap aftermarket heads for the same price as the work done to those.

 

You have mail, Josh!

 

flyitlikustolit,

Where'd you get the idea for your screen name?

 

not long ago, I was training to be a pilot, and liked the sound of it. and driveitlikeustolit was longer than 16 characters.





thanks for the tips. we're going to the junkyard on weds and fri, hopefully we'll find something... were 305 TBI motors roller motors? I know where to get some heads from a roller motor for cheap....

 

You don't want any tbi heads, they are all pure crap. You want 081 heads from a 305 TPI.

 

Bring your 416s out to whatever chamber size you need.

Dissasemble your 416s. Get yourself some carbide bits and an old shim head gasket (the type that came stock, not a replacement one). Lay it on the cylinder head.

Grab your die grinder, and lay the edge of the chamber back slightly all around, not taking too much metal out of any one spot. You don't want to sit in one spot grinding, because you could break through. After you do some, cc the chamber and see where you are by. I brought mine up to 63 cc without removing much metal at all.

To cc the chamber, grab an old cd (that you don't want of course), a syringe, and some petroleum jelly. Apply a thin layer of petroleum jelly all around the edge of the cd. Have the head facing up as level as possible, and center the cd over the chamber. Inside the cd hole, is where you are going to use the syringe to insert water. Keep track of the amount of ccs it takes to fill it up.

Obviously, you need to have both valves in (not necessarily installed though) and the spark plug. Otherwise, your water wouldn't stay in the head very long...