My friend Max of Maximum Air Flow here in Sioux City Iowa worked the intake and heads.

Let me back up a bit to get everyone up to speed. I started this project wanting to build a stroker motor out of all Ford parts or as many as I could. I had a set of '70 Boss 302 heads in the garage that had been collecting dust for a few years, so decided to use them. Since I was putting them on a 351W block, I needed an intake that would work with the Cleveland style heads. I bought a Track Boss 351 W for the project.

Okay there are pictures of parts (heads, rods, intake) at the picture site in my signature block. Select the Maximum Air Flow photo album there.

Back to the heads. Max said I needed to increase the velocity in the Boss heads for this engine. He went to work raising the intake port floors, reworking the runners and combustion chambers. The intake runners went from 256cc (stock) to 233cc. Stock size valves are used in the heads i-2.19" and e-1.71".

We flowed the heads in stock configuration and then after the rework -- the numbers are listed below.

STOCK HEAD

Lift Intake Exhaust
inches cfm cfm

.100 73 51
.200 129 91
.300 190 127
.400 238 155
.500 266 172
.600 284 182
.700 296 188
.750 298 190

PORTED HEAD

Lift Intake Exhaust
inches cfm cfm

.100 71 63
.200 140 116
.300 210 154
.400 264 186
.500 304 207
.600 337 217
.700 357 222
.750 340 226

These are some pretty impressive numbers. The exhaust numbers are not the greatest but the without raising the exhaust ports (no thanks) we had to live with a light port job. The dual pattern cam I selected should help compensate for it though. Also, you will note a reversion starting at .750" on the ported head. That should not be a problem as I will only be lifting the valves .716"

I do not have updated pics of the finished heads but do have updated pics of the intake. They are the last 8 pictures at my photo album site, if you are intersted. Note how the runner floors were leveled with epoxy and opened (matched to the heads). Max's signature is the diamond pattern in the plenum floor. Not a good pic of that but you can see it.

More to come in following weeks.

Hey thanks for reading this far ... comments and recommendations welcomed.

Gene

May I ask about your crank/rod/piston combination for your 358. Interested in how your engine was built. Did you use stock heads? What intake?

Thanks for the interest. I will keep the forum posted as I build the engine and get it going.

Gene