Thread: Newbie needs help Cam size

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Just bought a used 3/4 ton PU Block#3970010 Head#'s 14014416 and 354434. Worth putting a comp 280H cam in. Plan on a 2800 stall speed, 400 trans. Not sure of the rear. Huge 16 bolts or so. Not sure of the gearing. Truck is a 84 chevy C-20. Looking to create a tire burner with a nice sounding engine.

get a matched set of heads b4 you get a cam. get some 64cc heads, then worry about a cam. your cam profile should be matched to the engine's comp ratio, which I can only assume is 8.5:1 now, and is only good for a 260H cam or so. get the comp to 9.0-9.5:1 with some decent 64cc heads, and go for a 260H, you want a tire burner so you want low end, the hotter the cam, the more low end you loose. when in doubt, go light on the cam or leave it alone.

Thanks Matt

Originally Posted by Irishhoag

Just bought a used 3/4 ton PU Block#3970010 Head#'s 14014416 and 354434. Worth putting a comp 280H cam in. Plan on a 2800 stall speed, 400 trans. Not sure of the rear. Huge 16 bolts or so. Not sure of the gearing. Truck is a 84 chevy C-20. Looking to create a tire burner with a nice sounding engine.

This 280h cam is to large for towing if that is what you are trying to do.
If it is a "pro-street truck the converter will work fine for that cam.
You also need a 4.10 gear and a 10.to 1 comp. ratio.

Not gonna use for towing. Just for fun.

Any idea of gearing in that year truck?

Originally Posted by Irishhoag

Any idea of gearing in that year truck?

3.73's are likely as it is a 3/4 ton.

Check for the tag on one of the bolts on the rear end cover, or compare the number of driveshaft revolutions to tire revolutions for a rough guess...

Thanks once again, Matt

Thanks Dave. All you guys are helpful!