HI,
Its a crane pre 86 hydr (non roller cam) and hydro lifters

Will this work in my 90 tpi?


Also can I blot on a pre 86 882 head to my 90 305 tpi?




Thank you,
Shane

 

Fast,

I can't answer whether or not the cam would work well with a TPI engine, since the later TPIs are speed-density control and are somewhat intolerant of cam lobe changes. Not knowing the specs of the cam, I couldn't really answer with any certainty.

Yes, you can make a factory non-roller cam fit a roller block. You'd have to eliminate the retainer plate, get a different timing set, get a set of longer push rods, eliminate the lifter rotational limiters and their retainer spring, install new lifters, and would end up with more money and effort in an inferior design.

Incidentally, the 1986 model year passenger cars STILL had a flat-tappet cam. Roller blocks did not commonly appear until the 1987 model year.

And '882 heads may not be a good choice for a '87-up block, unless you are prepared to replace or alter the intake as well. The center two intake bolt holes on either side are drilled/tapped at a 90° angle on early heads, and a 72° angle on post-'87 heads. You would also have to modify the rocker alignment system, since your self-aligning rockers would not be compatible with the older heads. Either use the original push rod guide slots and a set of older style rockers, machine the heads to install screwed studs and guide plates, or use the self-aligning rockers after machining clearance in the guide holes in the heads. Even if you use the older style rockers, you may still have to machine the guide holes on the heads with an aftermarket cam to provide adequate push rod end clearance.

Moreover, the stock TPI heads from 1990 are probably superior to the raw '882 castings for flow and compression on your engine. You'd drop compression about 2 points and restrict the intake with those smogger heads. 333882 heads are best used for door stops or boat anchors, IMO.

It seems that you might want to do a bit more homework before unbolting anything.

 

Incidentally, with those heads ('882) and the correct 4.020" head gasket, your static compression ratio would drop from 9.32:1 down to 7.65:1. That wouldn't only hurt performance, but mileage and emissions as well.