Anyone know a place to mod 351C head for a 351w block?

RBOD

RBOD

Club Member
I'm throwing around the idea of building a "Clevor" engine. 4v Cleveland heads flow small woodland creatures and are cheap and available. Anyone know a place/guy/gal that does the coolant passage mods to the heads to work with Windsor engines? I know working with cast iron is a MFer so it's probably not something just any shop will tackle. Thanks in advance.
 
Clevor head mods are not difficult. I was going to bring my heads to Champion, but have not had a chance yet. The swap is actually getting more popular - trick flow and edelbrock offer the canted heads and correct intake even in fuel injection. CHI and other brands sell the remote thermostat housing. You can use Cleveland pistons or custom on the correct connecting rod length. Building a clevor costs about the same as piecing together decent aftermarket windsor stuff after you find the good quench chamber iron heads, intake that fits, pistons and rods.

that's my 408 based clevor
IMAG007999.jpg
 
RBOD said:
Plugging square holes in cast iron AND getting them to seal is beyond me. I can drill the new ones and cut the dowel off no problem.
Click to expand...

Machining is actually trivial, I was going to take my heads to school and do them myself on a knee mill. They just drill the square hole and put a round plug in with some thread sealer, it's done all the time. I'm running an old SVO Yates intake 9.2 deck and I planned on drilling the front of the heads and not running a thermostat at all.
 
monster. said:
Clevor head mods are not difficult. I was going to bring my heads to Champion, but have not had a chance yet. The swap is actually getting more popular - trick flow and edelbrock offer the canted heads and correct intake even in fuel injection. CHI and other brands sell the remote thermostat housing. You can use Cleveland pistons or custom on the correct connecting rod length. Building a clevor costs about the same as piecing together decent aftermarket windsor stuff after you find the good quench chamber iron heads, intake that fits, pistons and rods.

that's my 408 based clevor
View attachment 76283
Click to expand...

That's pretty much exactly what I'm looking to do. I'll be getting a new rotating assembly so piston selection will be easy.

monster. said:
Machining is actually trivial, I was going to take my heads to school and do them myself on a knee mill. They just drill the square hole and put a round plug in with some thread sealer, it's done all the time. I'm running an old SVO Yates intake 9.2 deck and I planned on drilling the front of the heads and not running a thermostat at all.
Click to expand...

Never really thought about doing it that way. That would be pretty easy to do. Let me know if you do this and how it came out. I should be able to do the same thing here at work.
 
Correction Cleveland 4v heads can suck the air out of a 3 county area
Another option is to get a pair of Aussie Cleveland heads smaller cc chambers
 
The 2v quench Aussie heads are great but I want to run the 4v with the ports filled to have the '3v' style. I'll be running ~.575" lift N/A so I won't be able to use all the 3^10th cfm that stock 4v flow but would like more than 2v.
 
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